On 30 August 2016 at 18:37, Roland Singer <roland.sin...@desertbit.com> wrote: > I am running 4.7.2, but I also just tried the 4.8.0-rc4 mainline kernel. > The result is the same. There is no difference if bbswitch of acpi_call > is used. However I noticed following: > > 1. The nouveau driver is broken in both kernel version and is responsible > for the freezes while gathering power state information with bbswitch. > Sometimes while shutting the system down, everything except the LCD > screen is switched off. This only happens with nouveau. > I noticed following error log messages: > I second Ilia here. Using bbswitch in conjunction with any driver (be that nouveau or the proprietary one) is a bad idea.
> kernel: nouveau 0000:01:00.0: fb: 6144 MiB GDDR5 > kernel: nouveau 0000:01:00.0: priv: HUB0: 10ecc0 ffffffff (1e40822c) > kernel: nouveau 0000:01:00.0: DRM: VRAM: 6144 MiB > kernel: nouveau 0000:01:00.0: DRM: GART: 1048576 MiB > kernel: nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid > kernel: nouveau 0000:01:00.0: DRM: DCB version 4.1 > kernel: nouveau 0000:01:00.0: DRM: Pointer to flat panel table invalid > > 2. -> Boot with nouveau module loaded > -> switch off the discrete GPU with bbswitch or acpi_call > -> start X11 > -> obtaining power state with bbswitch freezes the system > -> or working with the system for some minutes freezes the system > (If Ilia's suggestions does not help) Confirm if the freeze is due to/as the GPU is powered on or off. > 3. -> Boot with nouveau module blacklisted > -> switch off the discrete GPU > -> start X11 > -> system immediately freezes > It's perfectly possible that the discrete GPU is set as boot one and X goes angry since there's no driver/way to bring it up. > 4. -> Boot with nouveau module blacklisted > -> switch off the discrete GPU > -> start Wayland > -> system runs - Note: I tried this for couple of days with 4.6 and 4.7 > mainline > and the system freezed randomly after some time. > However I have to test if this is still present > with 4.7.2 > and 4.8 mainline. Right now it seams to be fine. > -> running Xwayland (does not depend on the GPU power state) kills > performance! > the system freezes for several seconds... > So working with Wayland is also no solution. > > My conclusion: > > 1. Nouveau has couple of problems with GTX 9** M Nvidia GPUs. > I would love to help here. > > 2. X11 is just broken and is not capable to start the graphical session > if the nvidia GPU is not handled by any video driver (kernel module). > Even forcing X11 to ignore the discrete GPU doesn't help. > Out of curiosity: how did you force X to ignore the device ? > Setting the command line arguments to: > > acpi_osi=! acpi_osi="Windows 2009" > > fixes the issues with X11 but other things break... > What the hell is going on?! :/ > You can check if it's the boot_vga assumption with Check wh You're a victum of the Windows specific fun (quirks?) in > Am 30.08.2016 um 17:48 schrieb Emil Velikov: >> On 30 August 2016 at 16:25, Roland Singer <roland.sin...@desertbit.com> >> wrote: >>> I tried these scenarios: >>> >>> 1. Booted the system without the bbswitch module. The nouveau module >>> was loaded and is responsible for the power management of the GPU. >>> The graphical session freezes after some minutes... >>> >>> 2. Booted the system without bbswitch and with nouveau blacklisted. >>> Manually loaded bbswitch to switch off the discrete GPU. >>> Same freeze after a while or by explicitly obtaining the GPU state. >>> >>> Is there a possibility to switch off the discrete card without bbswitch? >>> If this is possible, then I could test this without nouveau and bbswitch >>> at all. If the system hangs, then it is not the video driver nor bbswitch. >>> >> As Ilia mentioned acpi_call should do it. You can also check with the >> nouveau/bbwswitch code to see which ones they use in your case and >> bash it manually. It might be that the 'wrong one' gets used thus >> things going horribly wrong. >> >> Regards, >> Emil >> >
