Hi all,
I am encountering some issues with my second monitor, connected via a DP - miniDP cable to my laptop.
Since today, the monitor does not detect the laptop.
The cable is not faulty, as in the boot the screens are mirrored (the 2nd monitor turns black only after the login screen).
In the Display Configuration settings, I get the alternating messages “An output has been removed. Settings have been reloaded.” and “An output has been added. Settings have been reloaded.”
I am on KDE.
>xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
2560x1440 60.00 + 59.99 59.99 59.96 59.95
1920x1440 60.00
1856x1392 60.01
1792x1344 60.01
2048x1152 59.99 59.98 59.90 59.91
1920x1200 59.88 59.95
1920x1080 60.01* 59.97 59.96 59.93
1600x1200 60.00
1680x1050 59.95 59.88
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1280x800 59.99 59.97 59.81 59.91
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
700x525 59.98
800x450 59.95 59.82
640x512 60.02
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
640x400 59.88 59.98
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
and rerunning :
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
2560x1440 60.00 + 59.99 59.99 59.96 59.95
1920x1440 60.00
1856x1392 60.01
1792x1344 60.01
2048x1152 59.99 59.98 59.90 59.91
1920x1200 59.88 59.95
1920x1080 60.01* 59.97 59.96 59.93
1600x1200 60.00
1680x1050 59.95 59.88
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1280x800 59.99 59.97 59.81 59.91
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
700x525 59.98
800x450 59.95 59.82
640x512 60.02
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
640x400 59.88 59.98
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
DP-1 connected (normal left inverted right x axis y axis)
2560x1440 59.95 + 74.92
2560x1080 59.98
2048x1152 60.00
1920x1200 59.88
1920x1080 60.00 50.00 59.94
1920x1080i 60.00 50.00 59.94
1600x1200 60.00
1680x1050 59.95
1280x1024 75.02 60.02
1440x900 59.89
1280x960 60.00
1280x800 59.81
1152x864 75.00
1280x768 59.87
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
800x600 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
and also the journalctl log :
> sudo journalctl -f
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 9350] Adding connected display with bus 4
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 9350] Emitting DDCA_Display_Status_Event[2041.753: DDCA_EVENT_DISPLAY_CONNECTED, card0-DP-1, dref: DDCA_Display_Ref[702], io_path:/dev/i2c-4, ddc working: true]
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 9350] libddcutil callback thread 0x7f7d1c0204c0 started
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 9350] Started 1 event callback thread(s)
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] Quiescing libddcutil API...
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] Quiesce libddcutil API complete
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] Display redetection starting.
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 9349] recheck thread terminating because watch thread terminated
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] Watch thread terminated.
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: Maximum number of clients reached
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: X11 RANDR api unavailable. Switching to Watch_Mode_Poll
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] X11 RANDR api unavailable. Switching to Watch_Mode_Poll
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] Watching for display connection changes, resolved watch mode = Watch_Mode_Poll, poll loop interval = 2000 millisec
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] extra_stabilization_millisec: 0, stabilization_poll_millisec: 100
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] libddcutil recheck thread (nil) started
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] libddcutil watch thread 0x5561c4799d80 started
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] Display redetection finished.
Apr 23 14:58:52 simon-X1 org_kde_powerdevil[1217]: [ 1217] Unquiescing libddcutil API...
Apr 23 14:58:53 simon-X1 org_kde_powerdevil[1217]: [ 9362] (dw_recheck_displays_func) Recheck interval: Slept for 200 millisec
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: RRNotify_OutputProperty (ignored)
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Timestamp: 2062130
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Output: 66
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Property: "EDID"
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: State (newValue, Deleted): 1
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: RRNotify_OutputProperty (ignored)
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Timestamp: 2062130
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Output: 66
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Property: "EDID"
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: State (newValue, Deleted): 1
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: RRNotify_OutputChange
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Timestamp: 22908
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Output: 66
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: CRTC: 0
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Mode: 0
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Rotation: "Rotate_0"
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Connection: "Disconnected"
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Subpixel Order: 0
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: RRScreenChangeNotify
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Timestamp: 22908
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Config_timestamp: 2062598
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Window: 41943047
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Root: 1284
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Rotation: "Rotate_0"
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Size ID: 6
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Size: 1920 1080
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: SizeMM: 508 285
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: RRNotify_OutputChange
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Timestamp: 22908
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Output: 66
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: CRTC: 0
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Mode: 0
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Rotation: "Rotate_0"
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Connection: "Disconnected"
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xcb.helper: Subpixel Order: 0
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: XRandROutput 66 update
m_connected: 0
m_crtc QObject(0x0)
CRTC: 0
MODE: 0
Connection: 1
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Output 66 : connected = false , enabled = false
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: XRandROutput 66 update
m_connected: 1
m_crtc QObject(0x0)
CRTC: 0
MODE: 0
Connection: 1
Apr 23 14:58:53 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Output 66 : connected = false , enabled = false
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Emitting configChanged()
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: XRandR::setConfig
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Requested screen size is QSize(1920, 1080)
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Needed CRTCs: 1
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Actions to perform:
Priorities: false
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Change Screen Size: false
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Disable outputs: false
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Change outputs: false
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: Enable outputs: false
Apr 23 14:58:54 simon-X1 kscreen_backend_launcher[1341]: kscreen.xrandr: XRandR::setConfig done!
Apr 23 14:58:56 simon-X1 org_kde_powerdevil[1217]: [ 9363] Removing connected display on bus 4