On Sun, May 29, 2016 at 12:27 PM, Andy Lutomirski <luto at kernel.org> wrote: > On Sun, May 29, 2016 at 12:22 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote: >> On Sun, May 29, 2016 at 3:07 PM, Andy Lutomirski <luto at kernel.org> wrote: >>> On Sat, May 28, 2016 at 5:48 PM, Ilia Mirkin <imirkin at alum.mit.edu> >>> wrote: >>>> Do you have mesa 11.2 or later? GM20x support was only added in mesa 11.2. >>>> >>> >>> I just upgraded to 11.2. I'm getting errors like this in the log: >>> >>> [ 5383.723240] nouveau 0000:09:00.0: fifo: read fault at 0000011000 >>> engine 07 [PBDMA0] client 06 [HOST] reason 00 [PDE] on channel -1 >>> [007f9ed000 unknown] >>> [ 5398.722676] nouveau 0000:09:00.0: systemd-logind[30778]: failed to >>> idle channel 2 [systemd-logind[30778]] >>> [ 5413.722853] nouveau 0000:09:00.0: systemd-logind[30778]: failed to >>> idle channel 2 [systemd-logind[30778]] >>> >>> and the display output in general is unreliable enough that I'm having >>> trouble telling whether the performance is remotely reasonable. >> >> If you're having trouble telling, that means it's not :) The error you >> pasted is quite odd. Was there anything in the log before those >> messages? If there's no channel associated, that means that it's the >> background copying between vram and sysmem? Not sure. > > Don't get too excited yet. In the process of upgrading mesa, I > managed to boot 4.5 without noticing. I'll post back later today with > actual valid test results. >
I replaced the monitor (turns out that my monitor had a known DP problem), and now the screen lights up reliably. I still get occasional log lines like this: [Jun26 09:25] nouveau 0000:09:00.0: fifo: FB_FLUSH_TIMEOUT [Jun26 09:30] nouveau 0000:09:00.0: fifo: FB_FLUSH_TIMEOUT [Jun26 09:32] nouveau 0000:09:00.0: fifo: CHSW_ERROR 00000004 [ +0.000162] nouveau 0000:09:00.0: fifo: CHSW_ERROR 00000005 [Jun26 09:46] nouveau 0000:09:00.0: disp: outp 04:0006:0f44: link training failed [ +0.107894] nouveau 0000:09:00.0: disp: outp 04:0006:0f44: link training failed but they aren't causing an obvious problem. >> >> Note that with maxwell we have yet to add EXA support to >> xf86-video-nouveau, so you're ending up with GLAMOR (and Ben and I >> disagree on whether EXA support should be added in the first place). >> There was also an issue that glamor was hitting with nouveau which >> appears to have dissipated, either due to a change in nouveau or a >> change in glamor. So you might consider upgrading to Xorg 1.18.3 (as >> glamor is part of X). I do have a serious performance issue, though: when I scroll in Firefox (default configuration), the whole system drops to ~1fps or less and, if I scroll enough (even putting the mouse over a simple page like start.fedoraproject.org and flicking the wheel up and down a few times), the entire desktop will become unusable for several seconds. I seem to have this problem under X and under Wayland. For better or for worse, forcing Firefox's layers acceleration on fixes the problem and scrolling is fast. I have no idea whether this is an X problem, a gnome-shell problem, a mesa problem, a kernel problem, or something else.
