Created attachment 139210 [details] msi gt73vr keyboard picture Running a MSI GT73VR which has a dedicated button to switch between graphic cards and requires a reboot, or use "MSI VGA Select V0.2 by Zibri" (https://github.com/Zibri/MSI-GT7x-VGA-SWITCH) Using hardware buttons Fn+Up / Fn+Down to control screen brightness doesn't work with nouveau drivers. Part of sudo lspci: 01:00.0 VGA compatible controller: NVIDIA Corporation GP104M [GeForce GTX 1080 Mobile] (rev a1) Subsystem: Micro-Star International Co., Ltd. [MSI] GP104M [GeForce GTX 1080 Mobile] Kernel driver in use: nouveau Kernel modules: nvidiafb, nouveau 01:00.1 Audio device: NVIDIA Corporation GP104 High Definition Audio Controller (rev a1) Subsystem: Micro-Star International Co., Ltd. [MSI] GP104 High Definition Audio Controller Kernel driver in use: snd_hda_intel Kernel modules: snd_hda_intel If I switch to the integrated graphics the Fn keys do work.
modinfo nouveau filename: /lib/modules/4.15.0-20-generic/kernel/drivers/gpu/drm/nouveau/nouveau.ko
srcversion: 035DF1535F8D81478394CE8
I believe that the backlight is just not hooked up for Pascal. There's a patch in bug #100446 (https://bugs.freedesktop.org/attachment.cgi?id=138646) which may address this.
(In reply to Ilia Mirkin from comment #3) > I believe that the backlight is just not hooked up for Pascal. > > There's a patch in bug #100446 > (https://bugs.freedesktop.org/attachment.cgi?id=138646) which may address > this. Would like to test, do I need to recompile the kernel for ubuntu?
Just recompiled the kernel from linux-source-4.15.tar.xz, version linux-4.15.17. Patched to add "case NV_DEVICE_INFO_V0_PASCAL:"(In reply to Ilia Mirkin from comment #3) > I believe that the backlight is just not hooked up for Pascal. > > There's a patch in bug #100446 > (https://bugs.freedesktop.org/attachment.cgi?id=138646) which may address > this. Ok finally tested the patch and recompiled kernel linux-4.15.17 on debian, but still same result, no backlight control, it's always at 100%. The folder "/sys/class/backlight/" is totally empty.
On KDE Plasma, at least I can use the operating system as normal, but with gnome 3 it's a nightmare, the mouse and user interface is so sluggish that it's impractical to use.
Note that I only patched the line "NV_DEVICE_INFO_V0_PASCAL", not any other kind of patch.
Ok tested again with the 4 patches from the kernel git I confirm that it works. Definitely the "case NV_DEVICE_INFO_V0_PASCAL:" line has to be added.
Closing since it's a dupe *** This bug has been marked as a duplicate of bug 100446 ***
The sluggish was caused by the gnome extension Dash to Dock.
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