Hi Marcin, You should do a git bisect rather than guessing about commits. I suspect that searching for "kernel git bisect fedora" should prove instructive if you're not sure how to do this. Cheers, -ilia On Mon, Dec 16, 2019 at 11:42 AM Marcin Zajączkowski <mszpak@xxxxx> wrote: > > Hi, > > I've encountered a severe regression in TU116 (probably also TU117) > introduced in 5.3-rc4 (valid also for recent 5.4.2) [1]. The system > usually hangs on the subsequent graphic mode related operation (calling > xrandr after login is enough) with the following error: > > > kernel: nouveau 0000:01:00.0: fifo: SCHED_ERROR 08 [] > ... > > kernel: nouveau 0000:01:00.0: DRM: failed to idle channel 0 [DRM] > > kernel: nouveau 0000:01:00.0: i2c: aux 0007: begin idle timeout ffffffff > > kernel: nouveau 0000:01:00.0: tmr: stalled at ffffffffffffffff > > kernel: ------------[ cut here ]------------ > > kernel: nouveau 0000:01:00.0: timeout > > kernel: WARNING: CPU: 10 PID: 384 at drivers/gpu/drm/nouveau/nvkm/subdev/bar/g84.c:35 g84_bar_flush+0xcf/> 0xe0 [nouveau] > > (detailed log in a corresponding issue - [1]) > > With earlier kernels there was no hardware acceleration for NVidia GTX > 1660 Ti, but at least I could use nouveau to disable it (to save > battery, trees and lower temperature) or even have an external output > (with Wayland). Now, the system is unusable with nouveau :(. > > I spent some time trying to narrow the scope using on the existing > kernel builds for Fedora. I was able to determine that the problem was > introduced between 5.3.0-0.rc3.git1.1 (commit 33920f1ec5bf - works fine) > and 5.3.0-0.rc4.git0.1 (tag v5.3-rc4 - fails with errors). > > It's just a few days (7-11 Aug) and "only" around 250 commits. I went > through them, but (based on the commits name) I haven't seen any nouveau > related changes and in general no very suspected drm related changes. > > > git log 33920f1ec5bf..v5.3-rc4 --stat > > > Maybe some of more nouveau/drm-experienced developers could take a look > at that to determine which commit could break it (to make it easier to > find out what should be fixed to prevent that regression)? > > > [1] - > https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/516 > > Thanks in advance > Marcin > _______________________________________________ > Nouveau mailing list > Nouveau@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/nouveau _______________________________________________ Nouveau mailing list Nouveau@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/nouveau
