Can you please indicate what exactly do you mean with
"Brightness control does not work with this option for me."
Does it work before suspending the system?
Can you please attach your dmesg log, as it is the one relevant in this case (whereas xf86-video-nouveau, mesa and libdrm are not)
Auke, Rik
AFAIK brightness/backlight is(can be) controlled via
1. ACPI
2. platform specific - (asus-laptop, samsung-laptop, thinkpad ...)
3. the gpu/card itself
On various system different ones work correctly
By default nouveau does not register it's device if an ACPI one exists
Note that the blob has similar behaviour but they have an option to override it.
If you suspect that the ACPI backlight control is buggy you can disable it by appending "acpi_backlight=vendor" to your kernel command line
This will fall back to either 2. or 3. - dmesg will tell you which one
Rik
Can you please indicate what exactly do you mean with
"Brightness control does not work with this option for me."
Does it work before suspending the system?
Can you please attach your dmesg log, as it is the one relevant in this case (whereas xf86-video-nouveau, mesa and libdrm are not)
Auke, Rik
AFAIK brightness/ backlight is(can be) controlled via
1. ACPI
2. platform specific - (asus-laptop, samsung-laptop, thinkpad ...)
3. the gpu/card itself
On various system different ones work correctly
By default nouveau does not register it's device if an ACPI one exists
Note that the blob has similar behaviour but they have an option to override it.
If you suspect that the ACPI backlight control is buggy you can disable it by appending "acpi_backlight =vendor" to your kernel command line
This will fall back to either 2. or 3. - dmesg will tell you which one
Feel free to give it a try
Cheers
Emil