[Intel-gfx] Approximately every other day video will freeze for no reason at all and no specific time between freezes.

[Chris]

To elaborate on this. The video is frozen to include the clock however I
can move the mouse cursor around the screen. I can not however switch
between window desktops. This happened on 28 Sept 2015 after an uptime
of 6d20h6m, on 30 Sept after an uptime of 1d23h10m and today after an
uptime of 1d20h12m. I have reported this bug at the Ubuntu Launchpad
site and per an individual there I was instructed to go from running
kernel 4.0.0-997-generic #201503310205 SMP Tue Mar
31 02:07:04 UTC 2015 (I could not report this bug because apport-collect
would error with 'non supported kernel') so he had me switch to kernel
3.19.0-30-generic #33~14.04.1-Ubuntu SMP Tue Sep 22 09:27:00 UTC 2015.
System info is Ubuntu 14.04.3 LTS Gnome-Shell 3.12.2. Computer is a Dell
Optiplex 780 with Bios A15. There are no errors shown in my syslog as in
previous problems where "Hangcheck...render ring idle" would show up.
All background processes such as Fetchmail, Procmail, Spam Assassin,
ClamAv and cron jobs continue to run normally.

Any assistance would be appreciated.

Chris

-- 
Chris
KeyID 0xE372A7DA98E6705C
31.11°N 97.89°W (Elev. 1092 ft)
15:31:29 up 21 min, 1 user, load average: 0.54, 0.35, 0.40
Ubuntu 14.04.3 LTS,