Hello, the brightness control on my laptop has not been working properly lately (I don't remember when it started not working or what package update could have broke it, sorry). Right after I boot my laptop, I am able to adjust the display brightness normally and it just works as it always has, however, if I put my laptop in sleep mode, upon waking it from sleep mode the brightness will only go between max brightness and slightly lower than max brightness, regardless of whether the i set it to 0% or 100%.
So far, i've tried booting my PC with the kernel parameter "amdgpu.backlight=0" and "acpi_backlight=video" which did not help. The issue still occurs regardless of whether I use X11 or Wayland. I haven't enabled any power saving settings that would affect the brightness.
amdgpu:brightness and amdgpu:actual_brightness both have correct values (I mention this since i've seen that people have had issues similar to what i'm describing caused by these values being wrong). Im assuming that this is caused by kernel 6.1 but I don't know when it was updated from 6.0 so it's possible that this is unrelated.
here is the info output about the display by hwinfo in case its relevant:My PC is on Debian 12 stable with KDE plasma as the desktop environment and an AMD(integrated) GPU. Thank you for any help with troubleshooting this!!
So far, i've tried booting my PC with the kernel parameter "amdgpu.backlight=0" and "acpi_backlight=video" which did not help. The issue still occurs regardless of whether I use X11 or Wayland. I haven't enabled any power saving settings that would affect the brightness.
amdgpu:brightness and amdgpu:actual_brightness both have correct values (I mention this since i've seen that people have had issues similar to what i'm describing caused by these values being wrong). Im assuming that this is caused by kernel 6.1 but I don't know when it was updated from 6.0 so it's possible that this is unrelated.
here is the info output about the display by hwinfo in case its relevant:
Code:
37: None 00.0: 10002 LCD Monitor [Created at monitor.125] Unique ID: rdCR.PcbQ5WIBmmB Parent ID: B35A.F7kdotf2ld0 Hardware Class: monitor Model: "LCD Monitor" Vendor: BOE Device: eisa 0x07b5 Serial ID: "0" Resolution: 1366x768@60Hz Size: 309x173 mm Year of Manufacture: 2018 Week of Manufacture: 5 Detailed Timings #0: Resolution: 1366x768 Horizontal: 1366 1414 1446 1528 (+48 +80 +162) -hsync Vertical: 768 771 777 790 (+3 +9 +22) +vsync Frequencies: 48.28 MHz, 31.60 kHz, 40.00 Hz Year of Manufacture: 2018 Week of Manufacture: 5 Detailed Timings #1: Resolution: 1366x768 Horizontal: 1366 1414 1446 1528 (+48 +80 +162) -hsync Vertical: 768 771 777 790 (+3 +9 +22) +vsync Frequencies: 72.42 MHz, 47.40 kHz, 59.99 Hz Config Status: cfg=new, avail=yes, need=no, active=unknown Attached to: #16 (VGA compatible controller) Statistics: Posted by worm-b0y — 2025-02-05 04:09