[Intel-gfx] i915 irq storm mitigation in 3.10

[Jan Niggemann]

Hi all,

Am 21.07.2013 22:43, schrieb Daniel Vetter:
> Can you please boot with drm.debug=0xe added to your kernel cmdline,
> do a cold boot (so that we get a storm) and then once everything is
> quiet grab the full kernel log (you probably have to grab it from the
> disk, dmesg has likely overflown) and upload it somewhere (since it's
> probably too big for the mailing lists)? Please also enable printk
> timestamps for your kernel so that we can create a timeline of
> everything going on.
I hope I did it correctly, apending both printk.time=1 and 
drm.debug=0xe to my kernel command line:
http://files.hz6.de/kern_20130722.log

> That log should give us a starting point, but I guess we need to run
> some debug patches past you to figure out what's going on in your
> system exactly.
Did the drm.debug option work, it's not very chatty?

>> Another thing I have noticed: All storm-related messages are about 
>> DP-3 and
>> HDMI-A-1, but my T400 doesn't have either a HDMI out nor a 
>> DisplayPort
>> connector...
> We'll only enable ports (and interrupts for them) if we think they're
> there. Could it be that there's a docking station for your machine
> available which would have these ports?
Hmm, yes, I think so.

Thank you all for helping diagnosing this issue!

Regards
jan