On Fri, 2016-01-29 at 10:11 -0600, Matt Zagrabelny wrote: > Package: src:linux > Version: 4.4-1~exp1 > Severity: important > > Dear Maintainer, > > I recently acquired a new video card: > > PNY NVIDIA Quadro NVS 510 2GB GDDR3 4-Mini DisplayPort Low Profile > PCI-Express Video Card VCNVS510DVI-PB > > Both with the 4.3 and 4.4 kernels, the nouveau driver crashes at random times with > messages like: > > nouveau 0000:02:00.0: fifo: CHSW_ERROR 00000002 > > flooding the journal. The average rate of messages being written to the > journal is 951 per second. Please look for this bug upstream, or open a new bug report, following the instructions at <https://wiki.freedesktop.org/nouveau/Bugs/>. > The processes with the most CPU usage are (unsurprisingly): > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 8354 root 20 0 0 0 0 D 100.0 0.0 12:56.34 Xorg > 19530 root 20 0 95844 23112 6220 R 99.7 0.2 1035:58 syslog-ng > > I have been able to recover the system via ssh: > > systemctl stop lightdm.service (this step can take a while and here are > some messages that correspond with the command) > > Jan 29 09:44:55 achilles kernel: nouveau 0000:02:00.0: fifo: CHSW_ERROR 00000002 > Jan 29 09:44:55 achilles kernel: nouveau 0000:02:00.0: timeout at /build/linux-tEELBQ/linux-4.4/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gpfifogk104.c:47/gk104_fifo_gpfifo_kick()! > Jan 29 09:44:55 achilles kernel: nouveau 0000:02:00.0: fifo: channel 4 [Xorg[8354]] kick timeout > Jan 29 09:44:55 achilles kernel: nouveau: Xorg[8354]:00000000:0000a06f: detach gr failed, -16 > Jan 29 09:44:55 achilles kernel: nouveau 0000:02:00.0: fifo: SCHED_ERROR 0d [] > > rmmod -f nouveau (this step can also take a while, once it is finished > the monitors report that there is no signal - which is expected, I > suppose. There is also a kernel issue with the unloading of the module.) [...] Is is not surprising that 'rmmod -f' results in a crash or other bad behaviour. It is generally better to reboot than to do that. Ben. -- Ben Hutchings Q. Which is the greater problem in the world today, ignorance or apathy? A. I don't know and I couldn't care less.
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