Bug 95109

Summary: multiple instances of buffer 186 on validation list
Product: xorg Reporter: chernoff
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description chernoff 2016-04-24 19:20:52 UTC 
OS:

Linux localhost.localdomain 4.1.13-100.fc21.x86_64 #1 SMP Tue Nov 10 13:13:20 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Two mirrored screens: ASUS laptop screen and Viewsonic VP2650wb 

Graphics card: NVIDIA Corporation G96M [GeForce 9650M GT] (rev a1)

System locks up with
kernel: nouveau E[gnome-shell[2035]] multiple instances of buffer 186 on validation list
kernel: nouveau E[gnome-shell[2035]] validate_init
kernel: nouveau E[gnome-shell[2035]] validate: -22
gnome-session[1905]: nouveau: kernel rejected pushbuf: Invalid argument

followed by a dump of ch0: buf data (I can include if useful)

and then many messages of the form

kernel: nouveau E[  PGRAPH][0000:01:00.0] TRAP_PROP - TP 0 - RT_FAULT - Address 00465f0000
kernel: nouveau E[  PGRAPH][0000:01:00.0] TRAP_PROP - TP 0 - e0c: 00000000, e18: 00000000, e1c: 00000000, e20: 00002a00, e24: 00030000
kernel: nouveau E[  PGRAPH][0000:01:00.0] ch 4 [0x003fc2a000 gnome-shell[2035]] subc 3 class 0x8297 mthd 0x15e0 data 0x00000000
kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x00465f0000 on channel 0x0003fc2a [gnome-shell[2035]] PGRAPH/PROP/RT0 reason: 

Gnome pointer is alive, no window buttons function. After about 2 minutes the system returns to normal.
Comment 1 Ilia Mirkin 2016-04-24 19:31:14 UTC 
What version of libdrm do you have? Specifically version 2.4.60 is known-broken for nouveau (see commit https://cgit.freedesktop.org/mesa/drm/commit/?id=812e8fe6ce46d733c30207ee26c788c61f546294)
Comment 2 chernoff 2016-04-24 19:49:58 UTC 

So, yes, that's the version I have and it's the latest
in the fc21 repos.

$ rpm -qa | grep libdrm
libdrm-devel-2.4.60-1.fc21.x86_64
libdrm-2.4.60-1.fc21.x86_64
libdrm-2.4.60-1.fc21.i686
Comment 3 Ilia Mirkin 2016-04-24 19:54:03 UTC 
Ah OK, that's a bit unfortunate... well 2.4.60 is broken for nouveau. Feel free to inform the fedora folk. You can also downgrade... I think 2.4.59 and older should be fine.
Comment 4 chernoff 2016-04-24 20:20:42 UTC 
OK, thanks for the speedy analysis!
Comment 5 Ilia Mirkin 2016-04-24 20:27:30 UTC 
Marking this as fixed (which it was... like a year ago). If you hit this issue with a fresher stack, feel free to reopen.

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