[Nouveau] [Bug 81072] [NVC1] GPU lockup after "read fault at 0x0000039000 [PAGE_NOT_PRESENT] from PCOPY0"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81072

--- Comment #3 from Andrew <andrew at fritztech.com> ---
I have the same issue (same symptoms and apparent cause). I can usually SSH
into the box, however a hard reset is required before the GPU will function
again. A soft reboot (using reboot or halt) leaves the screen on and with
whatever image was there when he GPU locked up. Generally the lock up occurs
when interacting with firefox but that might be coincidental.

Here is the tail end of dmesg last time it occurred:

[631973.764168] scsi 21:0:0:0: Direct-Access     Generic  Ultra HS-SD/MMC  1.82
PQ: 0 ANSI: 0
[631973.764503] sd 21:0:0:0: Attached scsi generic sg8 type 0
[631973.781306] sd 21:0:0:0: [sdh] Attached SCSI removable disk
[670004.997024] type=1400 audit(1415799667.273:94): apparmor="STATUS"
operation="profile_replace" profile="unconfined"
name="/usr/lib/cups/backend/cups-pdf" pid=24612 comm="apparmor_parser"
[670004.997030] type=1400 audit(1415799667.273:95): apparmor="STATUS"
operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd"
pid=24612 comm="apparmor_parser"
[670004.997300] type=1400 audit(1415799667.273:96): apparmor="STATUS"
operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd"
pid=24612 comm="apparmor_parser"
[757535.322498] type=1400 audit(1415887157.175:97): apparmor="STATUS"
operation="profile_replace" profile="unconfined"
name="/usr/lib/cups/backend/cups-pdf" pid=3423 comm="apparmor_parser"
[757535.322505] type=1400 audit(1415887157.175:98): apparmor="STATUS"
operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd"
pid=3423 comm="apparmor_parser"
[757535.322776] type=1400 audit(1415887157.175:99): apparmor="STATUS"
operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd"
pid=3423 comm="apparmor_parser"
[757612.584375] nouveau E[   PFIFO][0000:01:00.0] read fault at 0x0000039000
[PAGE_NOT_PRESENT] from PCOPY0/PCOPY0 on channel 0x001fdb2000 [DRM]

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