linux-4.4 bisected: kwin5 stuck on kde5 loading screen with radeon

[Vlastimil Babka]

On 01/16/2016 05:24 AM, Mario Kleiner wrote:
>
>
> On 01/15/2016 01:26 PM, Ville Syrjälä wrote:
>> On Fri, Jan 15, 2016 at 11:34:08AM +0100, Vlastimil Babka wrote:
>
> I'm currently running...
>
> while xinit /usr/bin/ksplashqml --test -- :1 ; do echo yay; done
>
> ... in an endless loop on Linux 4.4 SMP PREEMPT on HD-5770  and so far i
> can't trigger a hang after hundreds of runs.
>
> Does this also hang for you?

No, test mode seems to be fine.

> I think a drm.debug=0x21 setting and grep'ping the syslog for "vblank"
> should probably give useful info around the time of the hang.

Attached. Captured by having kdm running, switching to console, running 
"dmesg -C ; dmesg -w > /tmp/dmesg", switch to kdm, enter password, see 
frozen splashscreen, switch back, terminate dmesg. So somewhere around 
the middle there should be where ksplashscreen starts...

> Maybe also check XOrg.0.log for (WW) warnings related to flip.

No such warnings there.

> thanks,
> -mario
>
>
>>> Thanks,
>>> Vlastimil
>>

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