Correct edid entry in edid data but it is not selectable

Support Graphics & Display
1

Manjaro Stable Latest with KDE Wayland.
I have an Acer CB382CUR ultrawide curved monitor which allows 75Hz at its native resolution of 3840x1600. Connecting my Dell 9310 (Intel Iris Xe) via USB-C and Displayport Alt Mode only allows setting the external monitor to 60Hz. Using a Macbook M4 this works with 75Hz with the same cable.

In Manjaro, when running the following little script to get the edid entries:

for f in `find /sys/devices -name 'edid'`; do echo "";echo $f;sudo cat $f| edid-decode;done

I get this output:

/sys/devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-4/edid
EDID of 'stdin' was empty.

/sys/devices/pci0000:00/0000:00:02.0/drm/card1/card1-HDMI-A-1/edid
EDID of 'stdin' was empty.

/sys/devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-2/edid
EDID of 'stdin' was empty.

/sys/devices/pci0000:00/0000:00:02.0/drm/card1/card1-eDP-1/edid
edid-decode (hex):

00 ff ff ff ff ff ff 00 4d 10 f9 14 00 00 00 00
15 1e 01 04 a5 1d 12 78 0e de 50 a3 54 4c 99 26
0f 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 28 3c 80 a0 70 b0 23 40 30 20
36 00 20 b4 10 00 00 18 20 30 80 a0 70 b0 23 40
30 20 36 00 20 b4 10 00 00 18 00 00 00 fe 00 56
56 4b 38 59 81 4c 51 31 33 34 4e 31 00 00 00 00
00 02 41 03 32 00 12 00 00 0a 01 0a 20 20 00 7f

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.4
  Vendor & Product Identification:
    Manufacturer: SHP
    Model: 5369
    Made in: week 21 of 2020
  Basic Display Parameters & Features:
    Digital display
    Bits per primary color channel: 8
    DisplayPort interface
    Maximum image size: 29 cm x 18 cm
    Gamma: 2.20
    Supported color formats: RGB 4:4:4, YCrCb 4:4:4
    Default (sRGB) color space is primary color space
    First detailed timing includes the native pixel format and preferred refresh rate
  Color Characteristics:
    Red  : 0.6396, 0.3291
    Green: 0.2998, 0.5996
    Blue : 0.1494, 0.0595
    White: 0.3125, 0.3281
  Established Timings I & II: none
  Standard Timings: none
  Detailed Timing Descriptors:
    DTD 1:  1920x1200   59.950171 Hz  16:10    74.038 kHz    154.000000 MHz (288 mm x 180 mm)
                 Hfront   48 Hsync  32 Hback   80 Hpol N
                 Vfront    3 Vsync   6 Vback   26 Vpol N
    DTD 2:  1920x1200   47.960137 Hz  16:10    59.231 kHz    123.200000 MHz (288 mm x 180 mm)
                 Hfront   48 Hsync  32 Hback   80 Hpol N
                 Vfront    3 Vsync   6 Vback   26 Vpol N
    Alphanumeric Data String: 'VVK8Y.LQ134N1'
    Manufacturer-Specified Display Descriptor (0x00): 00 00 00 02 41 03 32 00 12 00 00 0a 01 0a 20 20 '....A.2.......  '
Checksum: 0x7f

/sys/devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-3/edid
edid-decode (hex):

00 ff ff ff ff ff ff 00 04 72 63 09 02 a5 87 22
1c 20 01 04 b5 58 25 78 3b e4 05 ad 4f 45 ab 27
0e 50 54 bf ef 80 71 4f 81 40 81 80 81 c0 81 00
95 00 b3 00 d1 c0 50 9a 00 a0 f0 40 2e 60 08 20
08 08 70 6f 31 00 00 1a 00 00 00 ff 00 31 32 32
38 37 41 35 30 32 34 32 30 30 00 00 00 fd 00 30
4b 82 82 3c 01 0a 20 20 20 20 20 20 00 00 00 fc
00 43 42 33 38 32 43 55 52 0a 20 20 20 20 01 54

02 03 34 f1 4b 01 03 04 12 13 05 14 1f 90 07 5a
23 09 07 07 83 01 00 00 67 03 0c 00 10 00 38 78
68 1a 00 00 01 01 30 4b 00 e3 05 e0 00 e6 06 05
01 60 60 45 02 3a 80 18 71 38 2d 40 58 2c 45 00
70 6f 31 00 00 1e 18 4c 00 a0 f0 40 17 60 08 20
98 00 70 6f 31 00 00 1a 4c c2 00 a0 f0 40 3a 60
08 20 c8 08 70 6f 31 00 00 1a 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 73

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.4
  Vendor & Product Identification:
    Manufacturer: ACR
    Model: 2403
    Serial Number: 579314946 (0x2287a502)
    Made in: week 28 of 2022
  Basic Display Parameters & Features:
    Digital display
    Bits per primary color channel: 10
    DisplayPort interface
    Maximum image size: 88 cm x 37 cm
    Gamma: 2.20
    DPMS levels: Off
    Supported color formats: RGB 4:4:4, YCrCb 4:4:4, YCrCb 4:2:2
    First detailed timing includes the native pixel format and preferred refresh rate
    Display supports continuous frequencies
  Color Characteristics:
    Red  : 0.6787, 0.3105
    Green: 0.2705, 0.6679
    Blue : 0.1523, 0.0546
    White: 0.3134, 0.3291
  Established Timings I & II:
    IBM     :   720x400    70.081663 Hz   9:5     31.467 kHz     28.320000 MHz
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    Apple   :   640x480    66.666667 Hz   4:3     35.000 kHz     30.240000 MHz
    DMT 0x05:   640x480    72.808802 Hz   4:3     37.861 kHz     31.500000 MHz
    DMT 0x06:   640x480    75.000000 Hz   4:3     37.500 kHz     31.500000 MHz
    DMT 0x08:   800x600    56.250000 Hz   4:3     35.156 kHz     36.000000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x0a:   800x600    72.187572 Hz   4:3     48.077 kHz     50.000000 MHz
    DMT 0x0b:   800x600    75.000000 Hz   4:3     46.875 kHz     49.500000 MHz
    Apple   :   832x624    74.551266 Hz   4:3     49.726 kHz     57.284000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
    DMT 0x11:  1024x768    70.069359 Hz   4:3     56.476 kHz     75.000000 MHz
    DMT 0x12:  1024x768    75.028582 Hz   4:3     60.023 kHz     78.750000 MHz
    DMT 0x24:  1280x1024   75.024675 Hz   5:4     79.976 kHz    135.000000 MHz
    Apple   :  1152x870    75.061550 Hz 192:145   68.681 kHz    100.000000 MHz
  Standard Timings:
    DMT 0x15:  1152x864    75.000000 Hz   4:3     67.500 kHz    108.000000 MHz
    DMT 0x20:  1280x960    60.000000 Hz   4:3     60.000 kHz    108.000000 MHz
    DMT 0x23:  1280x1024   60.019740 Hz   5:4     63.981 kHz    108.000000 MHz
    DMT 0x55:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
    DMT 0x1c:  1280x800    59.810326 Hz  16:10    49.702 kHz     83.500000 MHz
    DMT 0x2f:  1440x900    59.887445 Hz  16:10    55.935 kHz    106.500000 MHz
    DMT 0x3a:  1680x1050   59.954250 Hz  16:10    65.290 kHz    146.250000 MHz
    DMT 0x52:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
  Detailed Timing Descriptors:
    DTD 1:  3840x1600   60.000000 Hz  12:5     98.760 kHz    395.040000 MHz (880 mm x 367 mm)
                 Hfront    8 Hsync  32 Hback  120 Hpol P
                 Vfront   32 Vsync   8 Vback    6 Vpol N
    Display Product Serial Number: '12287A5024200'
    Display Range Limits:
      Monitor ranges (Range Limits Only): 48-75 Hz V, 130-130 kHz H, max dotclock 600 MHz
    Display Product Name: 'CB382CUR'
  Extension blocks: 1
Checksum: 0x54

----------------

Block 1, CTA-861 Extension Block:
  Revision: 3
  Underscans IT Video Formats by default
  Basic audio support
  Supports YCbCr 4:4:4
  Supports YCbCr 4:2:2
  Native detailed modes: 1
  Video Data Block:
    VIC   1:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    VIC   3:   720x480    59.940060 Hz  16:9     31.469 kHz     27.000000 MHz
    VIC   4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
    VIC  18:   720x576    50.000000 Hz  16:9     31.250 kHz     27.000000 MHz
    VIC  19:  1280x720    50.000000 Hz  16:9     37.500 kHz     74.250000 MHz
    VIC   5:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz
    VIC  20:  1920x1080i  50.000000 Hz  16:9     28.125 kHz     74.250000 MHz
    VIC  31:  1920x1080   50.000000 Hz  16:9     56.250 kHz    148.500000 MHz
    VIC  16:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (native)
    VIC   7:  1440x480i   59.940060 Hz  16:9     15.734 kHz     27.000000 MHz
    VIC  90:  2560x1080   60.000000 Hz  64:27    66.000 kHz    198.000000 MHz
  Audio Data Block:
    Linear PCM:
      Max channels: 2
      Supported sample rates (kHz): 48 44.1 32
      Supported sample sizes (bits): 24 20 16
  Speaker Allocation Data Block:
    FL/FR - Front Left/Right
  Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
    Source physical address: 1.0.0.0
    DC_36bit
    DC_30bit
    DC_Y444
    Maximum TMDS clock: 600 MHz
  Vendor-Specific Data Block (AMD), OUI 00-00-1A:
    Version: 1
    Feature Caps: 0x01
    Minimum Refresh Rate: 48 Hz
    Maximum Refresh Rate: 75 Hz
    Flags 1.x: 0x00
  Colorimetry Data Block:
    BT2020cYCC
    BT2020YCC
    BT2020RGB
  HDR Static Metadata Data Block:
    Electro optical transfer functions:
      Traditional gamma - SDR luminance range
      SMPTE ST2084
    Supported static metadata descriptors:
      Static metadata type 1
    Desired content max luminance: 96 (400.000 cd/m^2)
    Desired content max frame-average luminance: 96 (400.000 cd/m^2)
    Desired content min luminance: 69 (0.293 cd/m^2)
  Detailed Timing Descriptors:
    DTD 2:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (880 mm x 367 mm)
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    4 Vsync   5 Vback   36 Vpol P
    DTD 3:  3840x1600   30.006161 Hz  12:5     48.700 kHz    194.800000 MHz (880 mm x 367 mm)
                 Hfront    8 Hsync  32 Hback  120 Hpol P
                 Vfront    9 Vsync   8 Vback    6 Vpol N
    DTD 4:  3840x1600   75.000000 Hz  12:5    124.350 kHz    497.400000 MHz (880 mm x 367 mm)
                 Hfront    8 Hsync  32 Hback  120 Hpol P
                 Vfront   44 Vsync   8 Vback    6 Vpol N
Checksum: 0x73  Unused space in Extension Block: 21 bytes

/sys/devices/pci0000:00/0000:00:02.0/drm/card1/card1-DP-1/edid
EDID of 'stdin' was empty.

As you can see the built-in laptop screen is the first entry at card1-eDP-1. All good with that. The external monitor is on card1-DP-3 and has two edid blocks. Manjaro or the Intel driver respectively only seems to see the first block as it contains the 60Hz setting only (it also provides a 30Hz setting for the native resolution).

However, the second block (CTA-861 Extension Block) contains the correct 75Hz setting. DTD 4 to be precise. How can I make Manjaro use this setting? The issue is there with X as well and also in Win11. Neither does it matter if I use the i915 driver or the new xe driver.

4

I’m a bit at a loss with this, so I’m posting here as Manjaro is my main distro.

I’m facing an annoying bug that persists across laptops (*1), across distros with different 6.x kernels (*2), across desktop environments (*3) and both, X and Wayland when using USB-C to USB-C Displayport Alt Mode with exactly 75Hz. This refresh rate is the monitor’s native maximum refresh rate and it just isn’t available in any distro, only ever 60Hz.
(Using HDMI to HDMI or USB-C to full DP 75Hz is available, so the bug is limited to DP Alt Mode over USB-C. Also, DP Alt Mode at 75Hz works on Win11 which is also installed on the Asus laptop.)

Any other monitor that has higher refresh rates works just fine across the board with the same cable and DP Alt Mode.

This makes me pretty confident that this is a kernel bug deep down (maybe in edid parsing?) and I’d like to report it. But kernel bug reporting is quite a mess having been to Reporting bugs — The Linux Kernel documentation. Which subsystem do I pick for this issue and how to I report it then? However, the main obstacle seems to be that I can’t test that on the most up-to-date kernel version which seems to be hard requirement for bugs to be taken seriously. You guys will have insights. Thank you!

(*1) tested with an Asus Zenbook with Intel and Intel ARC, Dell Inspiron with Intel and Intel Xe and Acer Swift Go with AMD
(*2) tested Ubuntu LTS and Manjaro Stable
(*3) tested Gnome and KDE Plasma 6

I can provide more details if needed, but this is not a Manjaro-only issue so I thought I’d ask for clearer instructions first.

5

The fact that other monitors work fine would first lead me to suspect that there is a bug in that monitor’s EDID rather than the kernel. Have you checked that?

Install the v4l-utils package for edid-decode if required. With the monitor connected via DP Alt Mode find the correct /sys/class/drm/YOUR-DEVICE-AND-PORT/edid device and then dump it with

edid-decode < /sys/class/drm/YOUR-DEVICE-AND-PORT/edid

Is the 75Hz mode correctly listed there?

6

So you want the details, that’s fine. I’ve collected all of this already.

As I said, the monitor works at 75Hz with Win11 or MacOS on the very same cable. So I don’t see how it could be the monitor.

I can post the edid tomorrow. It’s all in there, though.

7

Here’s the decoded edid using DP Alt over USB-C (75Hz not working, maximum available is 75Hz)

edid-decode (hex):

00 ff ff ff ff ff ff 00 04 72 63 09 02 a5 87 22
1c 20 01 04 b5 58 25 78 3b e4 05 ad 4f 45 ab 27
0e 50 54 bf ef 80 71 4f 81 40 81 80 81 c0 81 00
95 00 b3 00 d1 c0 50 9a 00 a0 f0 40 2e 60 08 20
08 08 70 6f 31 00 00 1a 00 00 00 ff 00 31 32 32
38 37 41 35 30 32 34 32 30 30 00 00 00 fd 00 30
4b 82 82 3c 01 0a 20 20 20 20 20 20 00 00 00 fc
00 43 42 33 38 32 43 55 52 0a 20 20 20 20 01 54

02 03 34 f1 4b 01 03 04 12 13 05 14 1f 90 07 5a
23 09 07 07 83 01 00 00 67 03 0c 00 10 00 38 78
68 1a 00 00 01 01 30 4b 00 e3 05 e0 00 e6 06 05
01 60 60 45 02 3a 80 18 71 38 2d 40 58 2c 45 00
70 6f 31 00 00 1e 18 4c 00 a0 f0 40 17 60 08 20
98 00 70 6f 31 00 00 1a 4c c2 00 a0 f0 40 3a 60
08 20 c8 08 70 6f 31 00 00 1a 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 73

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.4
  Vendor & Product Identification:
    Manufacturer: ACR
    Model: 2403
    Serial Number: 579314946 (0x2287a502)
    Made in: week 28 of 2022
  Basic Display Parameters & Features:
    Digital display
    Bits per primary color channel: 10
    DisplayPort interface
    Maximum image size: 88 cm x 37 cm
    Gamma: 2.20
    DPMS levels: Off
    Supported color formats: RGB 4:4:4, YCrCb 4:4:4, YCrCb 4:2:2
    First detailed timing includes the native pixel format and preferred refresh rate
    Display supports continuous frequencies
  Color Characteristics:
    Red  : 0.6787, 0.3105
    Green: 0.2705, 0.6679
    Blue : 0.1523, 0.0546
    White: 0.3134, 0.3291
  Established Timings I & II:
    IBM     :   720x400    70.081663 Hz   9:5     31.467 kHz     28.320000 MHz
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    Apple   :   640x480    66.666667 Hz   4:3     35.000 kHz     30.240000 MHz
    DMT 0x05:   640x480    72.808802 Hz   4:3     37.861 kHz     31.500000 MHz
    DMT 0x06:   640x480    75.000000 Hz   4:3     37.500 kHz     31.500000 MHz
    DMT 0x08:   800x600    56.250000 Hz   4:3     35.156 kHz     36.000000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x0a:   800x600    72.187572 Hz   4:3     48.077 kHz     50.000000 MHz
    DMT 0x0b:   800x600    75.000000 Hz   4:3     46.875 kHz     49.500000 MHz
    Apple   :   832x624    74.551266 Hz   4:3     49.726 kHz     57.284000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
    DMT 0x11:  1024x768    70.069359 Hz   4:3     56.476 kHz     75.000000 MHz
    DMT 0x12:  1024x768    75.028582 Hz   4:3     60.023 kHz     78.750000 MHz
    DMT 0x24:  1280x1024   75.024675 Hz   5:4     79.976 kHz    135.000000 MHz
    Apple   :  1152x870    75.061550 Hz 192:145   68.681 kHz    100.000000 MHz
  Standard Timings:
    DMT 0x15:  1152x864    75.000000 Hz   4:3     67.500 kHz    108.000000 MHz
    DMT 0x20:  1280x960    60.000000 Hz   4:3     60.000 kHz    108.000000 MHz
    DMT 0x23:  1280x1024   60.019740 Hz   5:4     63.981 kHz    108.000000 MHz
    DMT 0x55:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
    DMT 0x1c:  1280x800    59.810326 Hz  16:10    49.702 kHz     83.500000 MHz
    DMT 0x2f:  1440x900    59.887445 Hz  16:10    55.935 kHz    106.500000 MHz
    DMT 0x3a:  1680x1050   59.954250 Hz  16:10    65.290 kHz    146.250000 MHz
    DMT 0x52:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
  Detailed Timing Descriptors:
    DTD 1:  3840x1600   60.000000 Hz  12:5     98.760 kHz    395.040000 MHz (880 mm x 367 mm)
                 Hfront    8 Hsync  32 Hback  120 Hpol P
                 Vfront   32 Vsync   8 Vback    6 Vpol N
    Display Product Serial Number: '12287A5024200'
    Display Range Limits:
      Monitor ranges (Range Limits Only): 48-75 Hz V, 130-130 kHz H, max dotclock 600 MHz
    Display Product Name: 'CB382CUR'
  Extension blocks: 1
Checksum: 0x54

----------------

Block 1, CTA-861 Extension Block:
  Revision: 3
  Underscans IT Video Formats by default
  Basic audio support
  Supports YCbCr 4:4:4
  Supports YCbCr 4:2:2
  Native detailed modes: 1
  Video Data Block:
    VIC   1:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    VIC   3:   720x480    59.940060 Hz  16:9     31.469 kHz     27.000000 MHz
    VIC   4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
    VIC  18:   720x576    50.000000 Hz  16:9     31.250 kHz     27.000000 MHz
    VIC  19:  1280x720    50.000000 Hz  16:9     37.500 kHz     74.250000 MHz
    VIC   5:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz
    VIC  20:  1920x1080i  50.000000 Hz  16:9     28.125 kHz     74.250000 MHz
    VIC  31:  1920x1080   50.000000 Hz  16:9     56.250 kHz    148.500000 MHz
    VIC  16:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (native)
    VIC   7:  1440x480i   59.940060 Hz  16:9     15.734 kHz     27.000000 MHz
    VIC  90:  2560x1080   60.000000 Hz  64:27    66.000 kHz    198.000000 MHz
  Audio Data Block:
    Linear PCM:
      Max channels: 2
      Supported sample rates (kHz): 48 44.1 32
      Supported sample sizes (bits): 24 20 16
  Speaker Allocation Data Block:
    FL/FR - Front Left/Right
  Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
    Source physical address: 1.0.0.0
    DC_36bit
    DC_30bit
    DC_Y444
    Maximum TMDS clock: 600 MHz
  Vendor-Specific Data Block (AMD), OUI 00-00-1A:
    Version: 1
    Feature Caps: 0x01
    Minimum Refresh Rate: 48 Hz
    Maximum Refresh Rate: 75 Hz
    Flags 1.x: 0x00
  Colorimetry Data Block:
    BT2020cYCC
    BT2020YCC
    BT2020RGB
  HDR Static Metadata Data Block:
    Electro optical transfer functions:
      Traditional gamma - SDR luminance range
      SMPTE ST2084
    Supported static metadata descriptors:
      Static metadata type 1
    Desired content max luminance: 96 (400.000 cd/m^2)
    Desired content max frame-average luminance: 96 (400.000 cd/m^2)
    Desired content min luminance: 69 (0.293 cd/m^2)
  Detailed Timing Descriptors:
    DTD 2:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (880 mm x 367 mm)
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    4 Vsync   5 Vback   36 Vpol P
    DTD 3:  3840x1600   30.006161 Hz  12:5     48.700 kHz    194.800000 MHz (880 mm x 367 mm)
                 Hfront    8 Hsync  32 Hback  120 Hpol P
                 Vfront    9 Vsync   8 Vback    6 Vpol N
    DTD 4:  3840x1600   75.000000 Hz  12:5    124.350 kHz    497.400000 MHz (880 mm x 367 mm)
                 Hfront    8 Hsync  32 Hback  120 Hpol P
                 Vfront   44 Vsync   8 Vback    6 Vpol N
Checksum: 0x73  Unused space in Extension Block: 21 bytes

And this is the decoded edid using HDMI (75Hz working)

edid-decode (hex):

00 ff ff ff ff ff ff 00 04 72 63 09 02 a5 87 22
1c 20 01 03 80 58 25 78 2a e4 05 ad 4f 45 ab 27
0e 50 54 bf ef 80 71 4f 81 40 81 80 81 c0 81 00
95 00 b3 00 d1 c0 50 9a 00 a0 f0 40 2e 60 08 20
08 08 70 6f 31 00 00 1a 00 00 00 ff 00 31 32 32
38 37 41 35 30 32 34 32 30 30 00 00 00 fd 00 30
4b 1e 82 3c 00 0a 20 20 20 20 20 20 00 00 00 fc
00 43 42 33 38 32 43 55 52 0a 20 20 20 20 01 00

02 03 4c f1 50 01 03 04 12 13 05 14 1f 10 07 5a
5d 5e 5f 60 61 23 09 07 07 83 01 00 00 6d 03 0c
00 10 00 38 3c 20 00 60 01 02 03 67 d8 5d c4 01
78 80 03 68 1a 00 00 01 01 30 4b e6 e3 05 e3 01
e4 0f 00 c0 00 e6 06 07 01 60 60 45 18 4c 00 a0
f0 40 17 60 08 20 98 00 70 6f 31 00 00 1a 4c c2
00 a0 f0 40 3a 60 08 20 c8 08 70 6f 31 00 00 1a
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 91

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.3
  Vendor & Product Identification:
    Manufacturer: ACR
    Model: 2403
    Serial Number: 579314946 (0x2287a502)
    Made in: week 28 of 2022
  Basic Display Parameters & Features:
    Digital display
    Maximum image size: 88 cm x 37 cm
    Gamma: 2.20
    DPMS levels: Off
    RGB color display
    First detailed timing is the preferred timing
  Color Characteristics:
    Red  : 0.6787, 0.3105
    Green: 0.2705, 0.6679
    Blue : 0.1523, 0.0546
    White: 0.3134, 0.3291
  Established Timings I & II:
    IBM     :   720x400    70.081663 Hz   9:5     31.467 kHz     28.320000 MHz
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    Apple   :   640x480    66.666667 Hz   4:3     35.000 kHz     30.240000 MHz
    DMT 0x05:   640x480    72.808802 Hz   4:3     37.861 kHz     31.500000 MHz
    DMT 0x06:   640x480    75.000000 Hz   4:3     37.500 kHz     31.500000 MHz
    DMT 0x08:   800x600    56.250000 Hz   4:3     35.156 kHz     36.000000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x0a:   800x600    72.187572 Hz   4:3     48.077 kHz     50.000000 MHz
    DMT 0x0b:   800x600    75.000000 Hz   4:3     46.875 kHz     49.500000 MHz
    Apple   :   832x624    74.551266 Hz   4:3     49.726 kHz     57.284000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
    DMT 0x11:  1024x768    70.069359 Hz   4:3     56.476 kHz     75.000000 MHz
    DMT 0x12:  1024x768    75.028582 Hz   4:3     60.023 kHz     78.750000 MHz
    DMT 0x24:  1280x1024   75.024675 Hz   5:4     79.976 kHz    135.000000 MHz
    Apple   :  1152x870    75.061550 Hz 192:145   68.681 kHz    100.000000 MHz
  Standard Timings:
    DMT 0x15:  1152x864    75.000000 Hz   4:3     67.500 kHz    108.000000 MHz
    DMT 0x20:  1280x960    60.000000 Hz   4:3     60.000 kHz    108.000000 MHz
    DMT 0x23:  1280x1024   60.019740 Hz   5:4     63.981 kHz    108.000000 MHz
    DMT 0x55:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
    DMT 0x1c:  1280x800    59.810326 Hz  16:10    49.702 kHz     83.500000 MHz
    DMT 0x2f:  1440x900    59.887445 Hz  16:10    55.935 kHz    106.500000 MHz
    DMT 0x3a:  1680x1050   59.954250 Hz  16:10    65.290 kHz    146.250000 MHz
    DMT 0x52:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
  Detailed Timing Descriptors:
    DTD 1:  3840x1600   60.000000 Hz  12:5     98.760 kHz    395.040000 MHz (880 mm x 367 mm)
                 Hfront    8 Hsync  32 Hback  120 Hpol P
                 Vfront   32 Vsync   8 Vback    6 Vpol N
    Display Product Serial Number: '12287A5024200'
    Display Range Limits:
      Monitor ranges (GTF): 48-75 Hz V, 30-130 kHz H, max dotclock 600 MHz
    Display Product Name: 'CB382CUR'
  Extension blocks: 1
Checksum: 0x00

----------------

Block 1, CTA-861 Extension Block:
  Revision: 3
  Underscans IT Video Formats by default
  Basic audio support
  Supports YCbCr 4:4:4
  Supports YCbCr 4:2:2
  Native detailed modes: 1
  Video Data Block:
    VIC   1:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    VIC   3:   720x480    59.940060 Hz  16:9     31.469 kHz     27.000000 MHz
    VIC   4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
    VIC  18:   720x576    50.000000 Hz  16:9     31.250 kHz     27.000000 MHz
    VIC  19:  1280x720    50.000000 Hz  16:9     37.500 kHz     74.250000 MHz
    VIC   5:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz
    VIC  20:  1920x1080i  50.000000 Hz  16:9     28.125 kHz     74.250000 MHz
    VIC  31:  1920x1080   50.000000 Hz  16:9     56.250 kHz    148.500000 MHz
    VIC  16:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
    VIC   7:  1440x480i   59.940060 Hz  16:9     15.734 kHz     27.000000 MHz
    VIC  90:  2560x1080   60.000000 Hz  64:27    66.000 kHz    198.000000 MHz
    VIC  93:  3840x2160   24.000000 Hz  16:9     54.000 kHz    297.000000 MHz
    VIC  94:  3840x2160   25.000000 Hz  16:9     56.250 kHz    297.000000 MHz
    VIC  95:  3840x2160   30.000000 Hz  16:9     67.500 kHz    297.000000 MHz
    VIC  96:  3840x2160   50.000000 Hz  16:9    112.500 kHz    594.000000 MHz
    VIC  97:  3840x2160   60.000000 Hz  16:9    135.000 kHz    594.000000 MHz
  Audio Data Block:
    Linear PCM:
      Max channels: 2
      Supported sample rates (kHz): 48 44.1 32
      Supported sample sizes (bits): 24 20 16
  Speaker Allocation Data Block:
    FL/FR - Front Left/Right
  Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
    Source physical address: 1.0.0.0
    DC_36bit
    DC_30bit
    DC_Y444
    Maximum TMDS clock: 300 MHz
    Extended HDMI video details:
      HDMI VICs:
        HDMI VIC 1:  3840x2160   30.000000 Hz  16:9     67.500 kHz    297.000000 MHz
        HDMI VIC 2:  3840x2160   25.000000 Hz  16:9     56.250 kHz    297.000000 MHz
        HDMI VIC 3:  3840x2160   24.000000 Hz  16:9     54.000 kHz    297.000000 MHz
  Vendor-Specific Data Block (HDMI Forum), OUI C4-5D-D8:
    Version: 1
    Maximum TMDS Character Rate: 600 MHz
    SCDC Present
    Supports 12-bits/component Deep Color 4:2:0 Pixel Encoding
    Supports 10-bits/component Deep Color 4:2:0 Pixel Encoding
  Vendor-Specific Data Block (AMD), OUI 00-00-1A:
    Version: 1
    Feature Caps: 0x01
    Minimum Refresh Rate: 48 Hz
    Maximum Refresh Rate: 75 Hz
    Flags 1.x: 0xe6 (MCCS)
  Colorimetry Data Block:
    xvYCC601
    xvYCC709
    BT2020cYCC
    BT2020YCC
    BT2020RGB
    Gamut Boundary Description Metadata Profile P0
  YCbCr 4:2:0 Capability Map Data Block:
    VIC  96:  3840x2160   50.000000 Hz  16:9    112.500 kHz    594.000000 MHz
    VIC  97:  3840x2160   60.000000 Hz  16:9    135.000 kHz    594.000000 MHz
  HDR Static Metadata Data Block:
    Electro optical transfer functions:
      Traditional gamma - SDR luminance range
      Traditional gamma - HDR luminance range
      SMPTE ST2084
    Supported static metadata descriptors:
      Static metadata type 1
    Desired content max luminance: 96 (400.000 cd/m^2)
    Desired content max frame-average luminance: 96 (400.000 cd/m^2)
    Desired content min luminance: 69 (0.293 cd/m^2)
  Detailed Timing Descriptors:
    DTD 2:  3840x1600   30.006161 Hz  12:5     48.700 kHz    194.800000 MHz (880 mm x 367 mm)
                 Hfront    8 Hsync  32 Hback  120 Hpol P
                 Vfront    9 Vsync   8 Vback    6 Vpol N
    DTD 3:  3840x1600   75.000000 Hz  12:5    124.350 kHz    497.400000 MHz (880 mm x 367 mm)
                 Hfront    8 Hsync  32 Hback  120 Hpol P
                 Vfront   44 Vsync   8 Vback    6 Vpol N
Checksum: 0x91  Unused space in Extension Block: 15 bytes

The monitor in question is this one 37.5" Acer CB382CUR - Specifications . The native resolution is 3840x1600 (24:10) at 75Hz.

8

I’d appreciate it a lot if someone finds an issue in the edid that’s not working properly
or
how I can install the latest kernel, recreate the issue and file a kernel bug report which seems to be the only way to file a valid bug there.

9

Giving this a push. Thank you!

10

Please see Forum Rules:

11

As you are experiencing these difficulties across a number of things, logic would dictate that your issue may have little to do with any of them.

Perhaps focus instead on the common denominator – your monitor(s); your cable(s) – hardware.

@MrLavender mentioned;

This seems plausible (to me), given your description.

A reminder that Manjaro forum is user-centric; meaning that dumping your EDID output, and sitting back impatiently with your arms crossed, possibly won’t achieve a great deal.

You might be better served contacting the monitor manufacturer. My opinion is that it’s unlikely to be Manjaro-related, especially given the scope outlined in the first post.

I note that you have ongoing issues with that monitor, as evidenced by your topic created in May this year which, incidentally has also received no response. Edit:- Both topics have now been merged.

I believe you’re very likely barking up the wrong tree, with thinking the issue is anything other than with the monitor concerned.

This should help with the first part of your question;

However, with the second part you may be on your own, to a great extent.

As evidenced by the general lack of response, there is likely not enough information provided for others to offer much assistance.

Certainly, asking others to identify possible contributors to an unsubstantiated bug across multiple devices, kernels, distributions, desktop environments, and display/window managers is unlikely to bear fruit.

I can only suggest you continue with your own research to hopefully reach a resolution.

Regards.

Anecdotal:-

It’s commonly known that a wrong cable can manifest in unexpected issues; a DP <=> DP cable can produce better results than a DP <=> HDMI or DP <=> USB-C cable (or adapter), for example.

Of course, we can only work within the limitations of hardware we have to work with. Sometimes the right cable might not be practical. :man_shrugging:

The two topics have been merged.

12

There is a way to modify an edid file and force to load it: Kernel mode setting - ArchWiki. Take a look here: How to override the EDID data of a monitor under Linux | foosel.net

13

Yes, I tried that, but the edid file is not the issue as the correct settings are included.

I will reply yo soundofthunder tomorrow.