https://bugzilla.kernel.org/show_bug.cgi?id=206781
Bug ID: 206781 Summary: GM104 (GeForce 840m) with many errors "fifo: SCHED_ERROR 20" Product: Drivers Version: 2.5 Kernel Version: 5.4 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: gsedej@gmail.com Regression: No
Created attachment 287821 --> https://bugzilla.kernel.org/attachment.cgi?id=287821&action=edit dmesg contining errors - shortend at end
Laptop HP Envy 15 with i7-4700mq and GeForce 840m on Ubuntu 18.04 and 20.04.
nouveau outputs many megabytes into system logs (kern.log and syslog) with "nouveau 0000:07:00.0: fifo: SCHED_ERROR 20 []"
full log is in attachment
some relevant output before "SCHED_ERROR"
nouveau 0000:07:00.0: NVIDIA GM108 (118010a2) ... nouveau 0000:07:00.0: bios: version 82.08.14.00.0e ... nouveau 0000:07:00.0: fb: 2048 MiB DDR3 nouveau 0000:07:00.0: bus: MMIO read of 00000000 FAULT at 6013d4 [ IBUS ] ... nouveau 0000:07:00.0: bus: MMIO read of 00000000 FAULT at 10ac08 [ IBUS ] nouveau 0000:07:00.0: fifo: fault 01 [WRITE] at 0000000000150000 engine 05 [BAR2] client 08 [HUB/HOST_CPU_NB] reason 02 [PTE] on channel -1 [007fd38000 unknown] nouveau 0000:07:00.0: fifo: fault 01 [WRITE] at 0000000000000000 engine 05 [BAR2] client 08 [HUB/HOST_CPU_NB] reason 0a [UNSUPPORTED_APERTURE] on channel -1 [007fd38000 unknown] vga_switcheroo: enabled [TTM] Zone kernel: Available graphics memory: 8164024 KiB nouveau 0000:07:00.0: fifo: SCHED_ERROR 20 [] nouveau 0000:07:00.0: fifo: SCHED_ERROR 20 [] nouveau 0000:07:00.0: fifo: SCHED_ERROR 20 [] ...
I have also reported here: https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/522
https://bugzilla.kernel.org/show_bug.cgi?id=206781
Ilia Mirkin (imirkin@alum.mit.edu) changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |imirkin@alum.mit.edu
--- Comment #1 from Ilia Mirkin (imirkin@alum.mit.edu) --- As mentioned on IRC, the MMIO faults at the start aren't anything to worry about.
These two I've never seen before:
nouveau 0000:07:00.0: fifo: fault 01 [WRITE] at 0000000000150000 engine 05 [BAR2] client 08 [HUB/HOST_CPU_NB] reason 02 [PTE] on channel -1 [007fd38000 unknown] nouveau 0000:07:00.0: fifo: fault 01 [WRITE] at 0000000000000000 engine 05 [BAR2] client 08 [HUB/HOST_CPU_NB] reason 0a [UNSUPPORTED_APERTURE] on channel -1 [007fd38000 unknown]
And the SCHED thing is most frequently due to the ctxsw firmware timing out or other error. But given the faults above, could easily be follow-on from that.
https://bugzilla.kernel.org/show_bug.cgi?id=206781
--- Comment #2 from gsedej@gmail.com --- In the first step: what can be done that other users would not have to deal with "nouveau.noaccel=1" or other kernel options just to use the system (assuming no need for 3D from dedicated card) I was also told it's issue with system (ubuntu's) logg-er or something? For me - I am using Ubuntu 16.04 with nvidia blob on this laptop. But when trying different ubuntu versions, I always get this spamming in system logs. (the laptop is HP ENVY 15-j192nf - K4D07EAR#ABF)
For the actual bug - how can this issue be further diagnosed? I found similar issues: https://bugzilla.kernel.org/show_bug.cgi?id=101911 https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/175 https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/352 https://bbs.archlinux.org/viewtopic.php?id=231444
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