Created attachment 114831 [details]
Attaching journalctl output after gnome 3.16 freeze. Freeze happened @ ~ 23:06

The gnome team thinks I may be hitting the same issue

NVIDIA Corporation GF119 [GeForce GT 610] (rev a1)

Versions:
Kernel 3.19.3-1-ARCH
xf86-video-nouveau 1.0.11-3
mesa 10.5.2-1

Attached my journal log

Somehow gnome-shell is able to convince nouveau to do something very dumb. I didn't even think this was possible... libdrm is supposed to de-dup these, no?

nouveau E[gnome-shell[1773]] multiple instances of buffer 215 on validation list
nouveau E[gnome-shell[1773]] validate_init
nouveau E[gnome-shell[1773]] validate: -22

I'm also getting the same errors since april 1st:

Apr 01 11:07:08 arjen-imac.office.react.nl kernel: nouveau E[gnome-shell[4997]] multiple instances of buffer 228 on validation list
Apr 01 11:36:47 arjen-imac.office.react.nl kernel: nouveau E[gnome-shell[905]] multiple instances of buffer 255 on validation list
Apr 01 13:51:37 arjen-imac.office.react.nl kernel: nouveau E[gnome-shell[2939]] multiple instances of buffer 146 on validation list
Apr 02 12:20:26 arjen-imac.office.react.nl kernel: nouveau E[gnome-shell[2939]] multiple instances of buffer 415 on validation list
Apr 02 17:00:46 arjen-imac.office.react.nl kernel: nouveau E[gnome-shell[895]] multiple instances of buffer 327 on validation list


Just before the 1st crash I upgrade mesa:

[2015-04-01 09:55] [ALPM] upgraded mesa (10.5.1-2 -> 10.5.2-1)


Versions:
Kernel 3.19.2-1-ARCH
xf86-video-nouveau 1.0.11-3
mesa 10.5.2-1
Gnome 3.14.2

So I think this is mesa related, and not related to Gnome 3.16.

I'm guessing all you guys have libdrm-2.4.60 -- can you try downgrading to libdrm-2.4.59?

I have the same issue and can confirm that downgrading
from libdrm-2.4.60 to libdrm-2.4.59 seems to stop the issue from
happening as there are no more hangs.

Thanks,
Rennie

git bisect puts the first bad commit @
commit 5ea6f1c32628887c9df0c53bc8c199eb12633fec
Author: Maarten Lankhorst <maarten.lankhorst@ubuntu.com>
Date:   Thu Feb 26 11:54:03 2015 +0100

    nouveau: make nouveau importing global buffers completely thread-safe, with tests
...


ArchLinux bug report (https://bugs.archlinux.org/task/44680) suggests an additional reproduction method "when I move my mouse over VLC's seekbar and it shows a small tooltip to show the time gnome-shell freezes".

My favourite is "run mplayer with vdpau, then move the window". I arrived at that one by accident, but that repros it 100%. No compositors or anything like that.

*** Bug 90201 has been marked as a duplicate of this bug. ***

I just push a commit[1] to libdrm which should fix this issue.

[1] http://cgit.freedesktop.org/mesa/drm/commit/?id=812e8fe6ce46d733c30207ee26c788c61f546294

(In reply to Ben Skeggs from comment #10)
> I just push a commit[1] to libdrm which should fix this issue.
> 
> [1]
> http://cgit.freedesktop.org/mesa/drm/commit/
> ?id=812e8fe6ce46d733c30207ee26c788c61f546294

I can confirm that this fixes my repro case (move mplayer vdpau window around). I knew it was something relating to named bo's, so good to see that the fix also involved those.

Created attachment 115697 [details]
jounralctl events when gnome-shell freezes

Gnome version is 3.14.4-2-fc21.  I had reported this event to the gnome team #749128; they referred me here.  I had initiated a download in firefox when this freeze occurred but i have experienced it in other applications

In closer review of the thread above I checked on downgrading libdrm from 2.4.60.  In my installation yum tells me I need to also downgrade libdrm-devel and apparently the downgrade version is 2.4.58 rather than 2.4.59.  Is that what you recommend?

(In reply to Joe Verreau from comment #13)
> In closer review of the thread above I checked on downgrading libdrm from
> 2.4.60.  In my installation yum tells me I need to also downgrade
> libdrm-devel and apparently the downgrade version is 2.4.58 rather than
> 2.4.59.  Is that what you recommend?

Joe, are you on the Fedora 22 bet? If so, an update will be going out soon. You can get it immediately from https://admin.fedoraproject.org/updates/FEDORA-2015-7930/libdrm-2.4.61-3.fc22

This is version 2.4.61, which fixes the regression. If you're not on F22, I expect updates will be coming soon. In the meantime, go ahead and downgrade to whatever works.

Matthew, actually I'm on fedora 21 so I will downgrade libdrm, libdrm-devel to 2.4.58 and await the update to 2.4.61 in the normal distribution.  thanks.

I too am experiencing the issue described in this ticket. It is affecting 6 machines all running Fedora 21. They generally hang around 2-3 times a day. Is there going to be an update to 2.4.61 pushed for Fedora 21 at some point?

I have a similar bug with

Debian Linux "testing" ("stretch")
GeForce 8400 GS Rev. 3
Linux 3.10-2-amd64
xserver-xorg-video-nouveau 1:1.0.11-1+b1
libdrm-nouveau1a 2.4.40-1~deb7u2
libdrm-nouveau2 2.4.60-3
libgl1-mesa-dri 10.5.7-1
libgl1-mesa-glx 10.5.7-1
Gnome 3.14.0-1

Created attachment 116767 [details]
when manipulating Gnome tray

See the error log produced by journalctl when manipulating Gnome tray.

This is fixed by not using libdrm 2.4.60 which was a buggy release on the nouveau end. libdrm 2.4.59 or libdrm 2.4.61 should work fine.

... at this point I'm inferring there will not be upgraded versions of libdrm, libdrm-devel for fc21?  I did downgrade my laptop from 2.4.60 to 2.4.58 in Jun as noted below.  I'm guessing the fix really is to go to fc22.  I ask because now my desktop is also experiencing these freeze ups tho not in the frequency that others have reported.