I have an Asus laptop with an AMD processor (Ryzen 5 5600H) and an integrated graphics card. When I set the display brightness to 100%, the actual brightness drops below 0%, meaning it becomes dimmer than when set to 0%. This problem has arisen recently, possibly following the latest update (Manjaro Stable), but I can’t say for certain as I don’t often set the brightness to 100%.
Has anyone else come across this problem?
There has been rumours that certain AMD graphics suffered from regression at some point in Linux 7.x.
The regression however has not manifested on any of my AMD systems a ThinkPad T495 AMD and a X13 AMD.
But I don’t use Linux 7.x.
Operating System: Manjaro Linux
KDE Plasma Version: 6.7.4
KDE Frameworks Version: 6.28.0
Qt Version: 6.11.1
Kernel Version: 6.18.44-1-MANJARO (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 5600H with Radeon Graphics
Memory: 16 GiB of RAM (15.0 GiB usable)
Graphics Processor: AMD Radeon Graphics
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: VivoBook_ASUSLaptop M1603QA_M1603QA
System Version: 1.0
I am seeing this too, so I set my brightness to 98%. Also running kernel 6.18
coming in next version of Kernel 7.1 (7.1.9 )
Add my Ryzen 5600G to that list - no issues with Linux71 (7.1.8-2) anyway.
Yes sure
❯ inxi -zv8
System:
Kernel: 6.18.44-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 16.1.1
clocksource: tsc avail: hpet,acpi_pm
parameters: BOOT_IMAGE=/vmlinuz-6.18-x86_64
root=UUID=45fa753c-3a23-4546-a575-86da868b130c rw quiet splash
udev.log_priority=3
Desktop: KDE Plasma v: 6.7.4 tk: Qt v: N/A info: frameworks v: 6.28.0
wm: kwin_wayland vt: 2 dm: N/A Distro: Manjaro base: Arch Linux
Machine:
Type: Laptop System: ASUSTeK product: VivoBook_ASUSLaptop M1603QA_M1603QA
v: 1.0 serial: <superuser required>
Mobo: ASUSTeK model: M1603QA v: 1.0 serial: <superuser required>
uuid: <superuser required> Firmware: UEFI vendor: American Megatrends LLC.
v: M1603QA.308 date: 05/22/2023
Battery:
ID-1: BAT0 charge: 26.2 Wh (60.5%) condition: 43.3/50 Wh (86.5%)
volts: 11.88 min: 11.88 model: ASUSTeK ASUS Battery type: Li-ion serial: N/A
charging: status: not charging control: start: N/A end: 60% cycles: 38
Memory:
System RAM: total: 16 GiB available: 15.02 GiB used: 5.52 GiB (36.7%)
Message: For most reliable report, use superuser + dmidecode.
Array-1: capacity: 32 GiB slots: 2 modules: 2 EC: None
max-module-size: 16 GiB note: est.
Device-1: Channel-A DIMM 0 type: DDR4 detail: synchronous unbuffered
(unregistered) size: 8 GiB speed: 3200 MT/s volts: note: check curr: 1
min: 1 max: 1 width (bits): data: 64 total: 64
manufacturer: Micron Technology part-no: 4ATF1G64HZ-3G2F1 serial: N/A
Device-2: Channel-B DIMM 0 type: DDR4 detail: synchronous unbuffered
(unregistered) size: 8 GiB speed: 3200 MT/s volts: note: check curr: 1
min: 1 max: 1 width (bits): data: 64 total: 64
manufacturer: Micron Technology part-no: 8ATF1G64HZ-3G2R1 serial: <filter>
PCI Slots:
Permissions: Unable to run dmidecode. Root privileges required.
CPU:
Info: model: AMD Ryzen 5 5600H with Radeon Graphics bits: 64 type: MT MCP
arch: Zen 3 gen: 3 level: v3 note: check built: 2021-22
process: TSMC n7 (7nm) family: 0x19 (25) model-id: 0x50 (80) stepping: 0
microcode: 0xA500012
Topology: cpus: 1x dies: 1 clusters: 1 cores: 6 threads: 12 tpc: 2
smt: enabled cache: L1: 384 KiB desc: d-6x32 KiB; i-6x32 KiB L2: 3 MiB
desc: 6x512 KiB L3: 16 MiB desc: 1x16 MiB
Speed (MHz): avg: 1109 min/max: 413/4281 boost: enabled scaling:
driver: amd-pstate-epp governor: powersave cores: 1: 1109 2: 1109 3: 1109
4: 1109 5: 1109 6: 1109 7: 1109 8: 1109 9: 1109 10: 1109 11: 1109 12: 1109
bogomips: 79054
Flags: 3dnowprefetch abm adx aes aperfmperf apic arat avic avx avx2 bmi1
bmi2 bpext cat_l3 cdp_l3 clflush clflushopt clwb clzero cmov cmp_legacy
constant_tsc cpb cppc cpuid cqm cqm_llc cqm_mbm_local cqm_mbm_total
cqm_occup_llc cr8_legacy cx16 cx8 de debug_swap decodeassists erms
extapic extd_apicid f16c flushbyasid fma fpu fsgsbase fsrm fxsr fxsr_opt
ht hw_pstate ibpb ibrs ibs invpcid irperf lahf_lm lbrv lm mba mca mce
misalignsse mmx mmxext monitor movbe msr mtrr mwaitx nonstop_tsc nopl npt
nrip_save nx ospke osvw overflow_recov pae pat pausefilter pclmulqdq
pdpe1gb perfctr_core perfctr_llc perfctr_nb pfthreshold pge pku pni
popcnt pse pse36 rapl rdpid rdpru rdrand rdseed rdt_a rdtscp rep_good sep
sha_ni skinit smap smca smep ssbd sse sse2 sse4_1 sse4_2 sse4a ssse3
stibp succor svm svm_lock syscall tce topoext tsc tsc_scale umip
user_shstk v_spec_ctrl v_vmsave_vmload vaes vgif vmcb_clean vme vmmcall
vpclmulqdq wbnoinvd wdt xgetbv1 xsave xsavec xsaveerptr xsaveopt xsaves
xtopology
Vulnerabilities:
Type: gather_data_sampling status: Not affected
Type: ghostwrite status: Not affected
Type: indirect_target_selection status: Not affected
Type: itlb_multihit status: Not affected
Type: l1tf status: Not affected
Type: mds status: Not affected
Type: meltdown status: Not affected
Type: mmio_stale_data status: Not affected
Type: old_microcode status: Not affected
Type: reg_file_data_sampling status: Not affected
Type: retbleed status: Not affected
Type: spec_rstack_overflow mitigation: Safe RET
Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
prctl
Type: spectre_v1 mitigation: usercopy/swapgs barriers and \__user pointer
sanitization
Type: spectre_v2 mitigation: Retpolines; IBPB: conditional; IBRS_FW;
STIBP: always-on; RSB filling; PBRSB-eIBRS: Not affected; BHI: Not
affected
Type: srbds status: Not affected
Type: tsa mitigation: Clear CPU buffers
Type: tsx_async_abort status: Not affected
Type: vmscape mitigation: IBPB before exit to userspace
Graphics:
Device-1: Advanced Micro Devices \[AMD/ATI\] Cezanne \[Radeon Vega Series /
Radeon Mobile Series\] vendor: ASUSTeK driver: amdgpu v: kernel arch: GCN-5
code: Vega process: GF 14nm built: 2017-20 pcie: gen: 3 speed: 8 GT/s
lanes: 16 ports: active: eDP-1 empty: HDMI-A-1 bus-ID: 03:00.0
chip-ID: 1002:1638 class-ID: 0300 temp: 42.0 C
Device-2: IMC Networks USB2.0 HD UVC WebCam driver: uvcvideo type: USB
rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 3-3:3 chip-ID: 13d3:5463
class-ID: fe01 serial: <filter>
Display: wayland server: X.org v: 1.21.1.24 with: Xwayland v: 24.1.13
compositor: kwin_wayland driver: X: loaded: amdgpu unloaded: modesetting
alternate: fbdev,vesa dri: radeonsi gpu: amdgpu display-ID: 0
Monitor-1: eDP-1 model: ChiMei InnoLux 0x1618 built: 2022 res:
mode: 1920x1200 hz: 60 scale: 120% (1.2) to: 1600x1000 dpi: 142 gamma: 1.2
chroma: red: x: 0.592 y: 0.349 green: x: 0.329 y: 0.557 blue: x: 0.153
y: 0.118 white: x: 0.314 y: 0.329 size: 344x215mm (13.54x8.46")
diag: 406mm (16") ratio: 16:10 modes: 1920x1200, 1920x1080, 1600x1200,
1680x1050, 1280x1024, 1440x900, 1280x800, 1280x720, 1024x768, 800x600,
640x480
API: EGL v: 1.5 hw: drv: amd radeonsi platforms: device: 0 drv: radeonsi
device: 1 drv: swrast gbm: drv: radeonsi surfaceless: drv: radeonsi wayland:
drv: radeonsi x11: drv: radeonsi
API: OpenGL v: 4.6 vendor: amd mesa v: 26.1.6-arch1.1 glx-v: 1.4
direct-render: yes renderer: AMD Radeon Graphics (radeonsi renoir ACO DRM
3.64 6.18.44-1-MANJARO) device-ID: 1002:1638 memory: 500 MiB unified: yes
display-ID: :0.0
API: Vulkan v: 1.4.357 layers: 2 device: 0 type: integrated-gpu name: AMD
Radeon Graphics (RADV RENOIR) driver: mesa radv v: 26.1.6-arch1.1
device-ID: 1002:1638 surfaces: N/A
Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
de: kscreen-console,kscreen-doctor wl: wayland-info x11: xdpyinfo,xprop
Audio:
Device-1: Advanced Micro Devices \[AMD/ATI\] Renoir/Cezanne HDMI/DP Audio
driver: snd_hda_intel v: kernel pcie: gen: 3 speed: 8 GT/s lanes: 16
bus-ID: 03:00.1 chip-ID: 1002:1637 class-ID: 0403
Device-2: Advanced Micro Devices \[AMD\] Audio Coprocessor vendor: ASUSTeK
driver: N/A alternate: snd_pci_acp3x, snd_rn_pci_acp3x, snd_pci_acp5x,
snd_pci_acp6x, snd_acp_pci, snd_rpl_pci_acp6x, snd_pci_ps,
snd_sof_amd_renoir, snd_sof_amd_rembrandt, snd_sof_amd_vangogh,
snd_sof_amd_acp63, snd_sof_amd_acp70 pcie: gen: 3 speed: 8 GT/s lanes: 16
bus-ID: 03:00.5 chip-ID: 1022:15e2 class-ID: 0480
Device-3: Advanced Micro Devices \[AMD\] Ryzen HD Audio vendor: ASUSTeK
driver: snd_hda_intel v: kernel pcie: gen: 3 speed: 8 GT/s lanes: 16
bus-ID: 03:00.6 chip-ID: 1022:15e3 class-ID: 0403
API: ALSA v: k6.18.44-1-MANJARO status: kernel-api with: aoss
type: oss-emulator tools: alsactl,alsamixer,amixer
Server-1: sndiod v: N/A status: off tools: aucat,midicat,sndioctl
Server-2: JACK v: 1.9.22 status: off tools: N/A
Server-3: PipeWire v: 1.6.8 status: active with: 1: pipewire-pulse
status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
tools: pactl,pw-cat,pw-cli,wpctl
Network:
Device-1: MEDIATEK MT7921 802.11ax PCIe Wireless Network Adapter \[Filogic
330\] vendor: AzureWave driver: mt7921e v: kernel pcie: gen: 2
speed: 5 GT/s lanes: 1 bus-ID: 01:00.0 chip-ID: 14c3:7961 class-ID: 0280
IF: wlp1s0 state: up mac: <filter>
IP v4: <filter> type: dynamic noprefixroute scope: global
broadcast: <filter>
IP v6: <filter> type: noprefixroute scope: global
IP v6: <filter> type: dynamic noprefixroute scope: global
IP v6: <filter> type: noprefixroute scope: link
Info: services: NetworkManager, systemd-timesyncd, wpa_supplicant
WAN IP: <filter>
Bluetooth:
Device-1: IMC Networks Wireless_Device driver: btusb v: 0.8 type: USB
rev: 2.1 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 3-2:2 chip-ID: 13d3:3563
class-ID: e001 serial: <filter>
Report: rfkill ID: hci0 rfk-id: 0 state: up address: see --recommends
Logical:
Message: No logical block device data found.
RAID:
Message: No RAID data found.
Drives:
Local Storage: total: 1.82 TiB used: 580.93 GiB (31.2%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Western Digital
model: WD BLACK SN7100 2TB size: 1.82 TiB block-size: physical: 512 B
logical: 512 B speed: 63.2 Gb/s lanes: 4 tech: SSD serial: <filter>
fw-rev: 7615M0WD temp: 26.9 C scheme: GPT
Message: No optical or floppy data found.
Partition:
ID-1: / raw-size: 100 GiB size: 97.87 GiB (97.87%) used: 38.61 GiB (39.4%)
fs: ext4 dev: /dev/nvme0n1p7 maj-min: 259:7 label: N/A
uuid: 45fa753c-3a23-4546-a575-86da868b130c
ID-2: /boot raw-size: 2 GiB size: 1.9 GiB (95.01%) used: 93.3 MiB (4.8%)
fs: ext4 dev: /dev/nvme0n1p6 maj-min: 259:6 label: N/A
uuid: acaceb85-43ff-4273-98ef-284f0956de6d
ID-3: /boot/efi raw-size: 2 GiB size: 2 GiB (99.80%) used: 332 KiB (0.0%)
fs: vfat dev: /dev/nvme0n1p5 maj-min: 259:5 label: N/A uuid: C271-48DA
ID-4: /home raw-size: 1.49 TiB size: 1.47 TiB (98.36%)
used: 542.23 GiB (36.1%) fs: ext4 dev: /dev/nvme0n1p8 maj-min: 259:8
label: N/A uuid: 5863ca40-0dc6-4edc-b36e-4ebb676d6cac
Swap:
Kernel: swappiness: 10 (default 60) cache-pressure: 100 (default) zswap: yes
compressor: zstd max-pool: 20%
ID-1: swap-1 type: partition size: 30 GiB used: 0 KiB (0.0%) priority: -2
dev: /dev/nvme0n1p9 maj-min: 259:9 label: N/A
uuid: 90e18a7f-457b-4f77-b2c6-6506fb86aaf5
Unmounted:
ID-1: /dev/nvme0n1p1 maj-min: 259:1 size: 200 MiB fs: vfat label: N/A
uuid: D4D3-E0D7
ID-2: /dev/nvme0n1p2 maj-min: 259:2 size: 16 MiB fs: <superuser required>
label: N/A uuid: N/A
ID-3: /dev/nvme0n1p3 maj-min: 259:3 size: 199.93 GiB fs: ntfs label: N/A
uuid: 0E1CD56E1CD55177
ID-4: /dev/nvme0n1p4 maj-min: 259:4 size: 772 MiB fs: ntfs label: N/A
uuid: A2DC4636DC46054F
USB:
Hub-1: 1-0:1 info: hi-speed hub with single TT ports: 4 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
class-ID: 0900
Hub-2: 2-0:1 info: super-speed hub ports: 2 rev: 3.1
speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
class-ID: 0900
Hub-3: 3-0:1 info: hi-speed hub with single TT ports: 4 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
class-ID: 0900
Device-1: 3-2:2 info: IMC Networks Wireless_Device type: bluetooth
driver: btusb interfaces: 3 rev: 2.1 speed: 480 Mb/s (57.2 MiB/s) lanes: 1
mode: 2.0 power: 100mA chip-ID: 13d3:3563 class-ID: e001 serial: <filter>
Device-2: 3-3:3 info: IMC Networks USB2.0 HD UVC WebCam type: video
driver: uvcvideo interfaces: 3 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s)
lanes: 1 mode: 2.0 power: 500mA chip-ID: 13d3:5463 class-ID: fe01
serial: <filter>
Hub-4: 4-0:1 info: super-speed hub ports: 2 rev: 3.1
speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
class-ID: 0900
Sensors:
System Temperatures: cpu: 53.2 C mobo: 34.0 C gpu: amdgpu temp: 44.0 C
Fan Speeds (rpm): cpu: 0
Repos:
Packages: 1562 pm: pacman pkgs: 1517 libs: 401 tools: pamac pm: flatpak
pkgs: 45
Active pacman repo servers in: /etc/pacman.d/mirrorlist
1: https://ftp.snt.utwente.nl/pub/linux/manjaro/stable/$repo/$arch
2: https://ftp.free.org/mirrors/repo.manjaro.org/repos/stable/$repo/$arch
3: https://mirror.futureweb.be/manjaro/stable/$repo/$arch
4: https://mirrors.up.pt/pub/manjaro/stable/$repo/$arch
5: https://mirror.it4i.cz/manjaro/stable/$repo/$arch
6: https://mirror1.sox.rs/manjaro/stable/$repo/$arch
7: https://fosszone.csd.auth.gr/manjaro/stable/$repo/$arch
8: https://mirrors.ucr.ac.cr/manjaro/stable/$repo/$arch
Processes:
CPU top: 5 of 316
1: cpu: 9.2% command: firefox pid: 34444 mem: 754.5 MiB (4.9%)
2: cpu: 7.0% command: firefox pid: 35095 mem: 337.9 MiB (2.1%)
3: cpu: 6.9% command: konsole pid: 35469 mem: 123.9 MiB (0.8%)
4: cpu: 5.2% command: zsh pid: 35481 mem: 10.6 MiB (0.0%)
5: cpu: 3.2% command: kwin_wayland pid: 1015 mem: 233.9 MiB (1.5%)
Memory top: 5 of 316
1: mem: 803.1 MiB (5.2%) command: plasmashell pid: 1131 cpu: 2.9%
2: mem: 754.5 MiB (4.9%) command: firefox pid: 34444 cpu: 9.2%
3: mem: 577.2 MiB (3.7%) command: QtWebEngineProcess pid: 1662 cpu: 0.0%
4: mem: 384.1 MiB (2.4%) command: firefox pid: 34832 cpu: 1.9%
5: mem: 346.4 MiB (2.2%) command: firefox pid: 34763 cpu: 1.5%
Info:
Processes: 316 Power: uptime: 6h 52m states: freeze,mem,disk suspend: s2idle
wakeups: 1 hibernate: platform avail: shutdown, reboot, suspend, test_resume
image: 5.95 GiB services: org_kde_powerdevil, power-profiles-daemon,
upowerd Init: systemd v: 261 default: graphical tool: systemctl
Compilers: clang: 22.1.8 gcc: 16.1.1 Shell: Zsh v: 5.9.2
running-in: konsole inxi: 3.3.41
I’ve corrected the formatting and unhidden your post. 
Yes, unfortunately I hadn’t noticed that. Wouldn’t be the first time. 
You mean, you keep count? 
Not enough spare cells in my brain for that, I just know it’s more than one. 
There is now a third user reporting this problem as well. 
Is there a pattern, like all AMD. I’m using intel, and I see no issue there.
Yes, indeed, it seems to be something specific to AMD systems.
Yes, I simply posted in the wrong thread. I’ve got a similar problem and created a separate thread. When I realised it wasn’t the right thread, I deleted the post…
Well, few of us are able to avoid the occasional “oops” moment.
However, keep in mind that Moderation staff can usually move a post to another topic on request, if it’s warranted.