Nouveau - Jul 2017 - [Bug 101676] New: kmail hangs or causes desktop to hang when used with Nouveau graphics driver

https://bugs.freedesktop.org/show_bug.cgi?id=101676

            Bug ID: 101676
           Summary: kmail hangs or causes desktop to hang when used with
                    Nouveau graphics driver
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: nick.craig.law at gmail.com
        QA Contact: nouveau at lists.freedesktop.org

Created attachment 132409
  --> https://bugs.freedesktop.org/attachment.cgi?id=132409&action=edit
syslog output when kmail causes kmail/desktop to hang

System Config, KDE Neon LTS 5.8.7, Nouveau driver 1:1.0.12-2 as described by
Ubuntu 16.04.1 LTS. Nvidia GeForce GTX570M, kmail 5.5.2.

Kmail will become unresponsive when attempting to scroll or click left on an
email. Sometimes just the controls/buttons in kmail will be unreponsive but
sometimes the whole desktop will become unreponsive and freeze, requiring a
ALT-SYSRq RSEIUB command to reboot system, ALT-F1 not working. If instead I use
the Nvidia 375 driver the problem disappears, so this problem seems to be
related to the use of the Nouveau driver. syslog reports the following errors..


Jul  2 23:02:30 nick-X681X kernel: [12787.488155] nouveau 0000:01:00.0:
kmail[8229]: Unknown handle 0x0000002c
Jul  2 23:02:30 nick-X681X kernel: [12787.488159] nouveau 0000:01:00.0:
kmail[8229]: validate_init
Jul  2 23:02:30 nick-X681X kernel: [12787.488161] nouveau 0000:01:00.0:
kmail[8229]: validate: -2
Jul  2 23:02:33 nick-X681X kernel: [12790.327435] nouveau 0000:01:00.0: gr:
TRAP ch 17 [005f1f4000 kmail[8229]]
Jul  2 23:02:33 nick-X681X kernel: [12790.327448] nouveau 0000:01:00.0: gr:
GPC0/TPC0/TEX: 80000041
Jul  2 23:02:33 nick-X681X kernel: [12790.327456] nouveau 0000:01:00.0: gr:
GPC0/TPC1/TEX: 80000041
Jul  2 23:02:33 nick-X681X kernel: [12790.327464] nouveau 0000:01:00.0: gr:
GPC0/TPC2/TEX: 80000041
Jul  2 23:02:33 nick-X681X kernel: [12790.327472] nouveau 0000:01:00.0: gr:
GPC0/TPC3/TEX: 80000041
Jul  2 23:02:33 nick-X681X kernel: [12790.327481] nouveau 0000:01:00.0: gr:
GPC1/TPC0/TEX: 80000041
Jul  2 23:02:33 nick-X681X kernel: [12790.327489] nouveau 0000:01:00.0: gr:
GPC1/TPC1/TEX: 80000041
Jul  2 23:02:33 nick-X681X kernel: [12790.327498] nouveau 0000:01:00.0: gr:
GPC1/TPC2/TEX: 80000041
Jul  2 23:02:33 nick-X681X kernel: [12790.327513] nouveau 0000:01:00.0: fifo:
read fault at 0002a0a000 engine 00 [PGRAPH] client 01 [GPC1/TEX] reason 02
[PAGE_NOT_PRESENT] on channel 17 [005f1f4000 kmail[8229]]
Jul  2 23:02:33 nick-X681X kernel: [12790.327516] nouveau 0000:01:00.0: fifo:
gr engine fault on channel 17, recovering...
Jul  2 23:03:33 nick-X681X kernel: [12850.755747] nouveau 0000:01:00.0:
kmail[8229]: failed to idle channel 17 [kmail[8229]]
Jul  2 23:03:48 nick-X681X kernel: [12865.757800] nouveau 0000:01:00.0:
kmail[8229]: failed to idle channel 17 [kmail[8229]]

It also generates a second different error on some occasions ie a FIFO read
fault at 0001afa00 engine 00 [PGRAPH] client 01 [GPC1/TEX] reason 02 [Page not
present] on channel 5.

This error tends to hang the entire desktop, hence why I have attached a photo
of the tail -f /var/log/syslog output.

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https://bugs.freedesktop.org/show_bug.cgi?id=101676

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
It's possible that some of these issues are fixed with newer software, but
ultimately I believe KDE likes to use multiple GL contexts from multiple
threads at the same time, while nouveau does not like it when you do that.

Until KDE started doing it, this was exceedingly rare. I believe they've
since
thrown wrenches into their internal logic to disable the threading, not sure.

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--- Comment #2 from Nick <nick.craig.law at gmail.com> ---
Thanks for the comment, I'll setup another KDE Neon in virtualbox with the
Nouveau driver, make sure I've still got the problem then wait for the
latest
KDE update and see if things have improved.

For my main system (used for work) I need something stable so am using the
Nvidia driver for the time being until things improve. I really like kmail and
have used it for years so don't really want to switch to Thunderbird which I
guess is a possible option for some.

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GitLab Migration User <gitlab-migration at fdo.invalid> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #3 from GitLab Migration User <gitlab-migration at
fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/1136.

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