| Bug ID | 108668 |
|---|---|
| Summary | drm/amd/display: set backlight level limit to 1: breaks users= pace programs assuming 0 is the minimum brightness |
| Product | DRI |
| Version | unspecified |
| Hardware | Other |
| OS | All |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/AMDgpu |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | samantham@posteo.net |
This commit https://git.kerne= l.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3D0cafc82fae41= 531b0162150f9a97f2c74f97118f breaks KDE and any other software that assumes setting 0 will induce the minimum brightness. Maybe it would make more sense to set the brightness le= vel to "1" if userspace requests brightness level "0" so pr= ograms still function correctly. If desired the call could still return false to indicate it was out of boun= ds, but still lower brightness.
In addition, even though there is a write error, when you read= back the brightness value, it shows that the backlight is at level 0, while its brightness has actually been unchanged from before: echo 0 > /sys/devices/pci0000:00/0000:00:08.1/0000:05:00.0/backlight/amdgpu_bl0/brig= htness bash: echo: write error: Invalid argument cat /sys/devices/pci0000:00/0000:00:08.1/0000:05:00.0/backlight/amdgpu_bl0/brig= htness 0
This should fix it: https://patchwork.freedesktop.org/patch/260537/
| What | Removed | Added |
|---|---|---|
| Resolution | --- | FIXED |
| Status | NEW | RESOLVED |