[Intel-gfx] i915 / 3.15 intermittently boots into blank screeen

[Jan Niggemann]

Hi Daniel,

Am 18.07.2014 15:27, schrieb Daniel Vetter:
> On Thu, Jul 17, 2014 at 10:31:30PM +0200, Jan Niggemann wrote:
>> I'm experiencing an issue with 3.15.5 on my Lenovo T400:
>> Since 3.15 (or 3.14, can't say for sure), the boot starts normally, 
>> but the
>> first mode change doesn't occur, resulting in a black screen with 
>> backlight
>> on. The system is entirely unresponsive and I can only press the 
>> power
>> button until to switch it off.
> I think the only way to move forward here is to double-check that 
> 3.14
> works and 3.15 is broken by recompiling with the same .config
> (occasionally config changes cause regressions). And then do a full 
> git
> bisect to find the offending commit.
thank you for the feedback.
I still have all my custom built kernels, I will test 3.14.0 through 
3.14.8 to make sure those were OK and report back.

Best regards
jan