https://bugzilla.kernel.org/show_bug.cgi?id=198885 Michel Dänzer (michel@xxxxxxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |harry.wentland@xxxxxxx --- Comment #1 from Michel Dänzer (michel@xxxxxxxxxxx) --- (In reply to Przemek from comment #0) > -r--r--r-- 1 root root 4096 02-22 13:41 actual_brightness [...] > "/sys/class/backlight/amdgpu_bl0 # echo 22 > actual_brightness > bash: actual_brightness: permission denied" As you can see above, this file is read-only. > "/sys/class/backlight/amdgpu_bl0 # echo 128 > brightness > bash: echo: błąd zapisu: Bad argument" What does cat max_brightness say? If it's a value smaller than 128, does writing a value <= that to the brightness file work? > Without "amdgpu.dc=1" in kernel command line changing brightness level is > working as expected, both Fn keys, and echoing directly to a file. What values do the brightness, max_brightness and actual_brightness files contain in that case? -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
