Re: Bug report: i915 screens stay blank with 3.8.3, ok with 3.8.2

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Daniel Vetter <daniel@xxxxxxxx> writes:

> On Sat, Mar 16, 2013 at 01:04:34PM +0100, Stephan Boettcher wrote:
>> 
>> Moin,
>> 
>> [1.] One line summary of the problem:
>> 
>>    Both screens stay blank during boot with 3.8.3.


This has been fixed in 3.8.4.  Sorry for the noise.


>> [2.] Full description of the problem/report:
>> 
>>    When booting the screens go blank soon after showing the grub menu.  
>>    Starting X11 does not bring the screens up either.
>>    In /var/log/dmesg two lines appear (diff -u):
>> 
>> @@ -432,8 +434,10 @@
>>  [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
>>  [drm] Driver supports precise vblank timestamp query.
>>  vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
>> +i915 0000:00:02.0: No connectors reported connected with modes
>> +[drm] Cannot find any crtc or sizes - going 1024x768
>>  fbcon: inteldrmfb (fb0) is primary device
>> -Console: switching to colour frame buffer device 240x75
>> +Console: switching to colour frame buffer device 128x48
>>  i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
>>  i915 0000:00:02.0: registered panic notifier
>>  i915: No ACPI video bus found
>
> Can you please file a bug report against bugs.freedesktop.org. 


They require to create an account, and I resolved to not open
accounts anywhere just to file bug reports, sorry.


> Please boot both broken and working kernel with drm.debug=0xe added to
> your kernel cmdline and attach the complete dmesg of each to the bug
> report.
>
> If you can do a quick bisect to figure out the offending commit, that
> would be good, too. And can you please also check whether the latest
> 3.9-rc kernel is affect? We need to know that since stable rules mandate
> that regressions in stable kernels can only be fixed once upstream is
> known to work.
>
> Thanks, Daniel

-- 
Dr. Stephan Böttcher                      Tel: +49-431-880-2508
Christian-Albrechts-Universität zu Kiel
Inst. f. Exp. u. Angew. Physik,  Abt. Extraterrestrische Physik
Leibnizstr. 11, 24118 Kiel, Germany
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