[Bug 95741] Broadwell graphics on Dell XPS13 (early 2015) loses horizontal sync on shift to tty console

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=95741

Tasev Nikola <tasev.stefanoska at skynet.be> changed:

           What    |Removed                     |Added
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                 CC|                            |tasev.stefanoska at skynet.be

--- Comment #15 from Tasev Nikola <tasev.stefanoska at skynet.be> ---
Hi,

I have an Asus UX305fa and I'm experiencing the same problem. 
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated
Graphics (rev 08)
After bisecting, I found the same bad commit as W Unruh: 

root at laura:~/Bureau/documents/linux-git# git bisect good 
cf4c7c12258ed9367f4fc45238f5f50d2db892c1 is the first bad commit
commit cf4c7c12258ed9367f4fc45238f5f50d2db892c1
Author: Matt Roper <matthew.d.roper at intel.com>
Date:   Thu Dec 4 10:27:42 2014 -0800  

But I don't know how to revert this commit to test if it's the good one. 
The 3.19 kernel works fine except the hor sync is messed up when the computer
is shut down (the final splash screen).  

The 4.0-rc1 doesn't work for switch to tty1,2,3,4,5 (with ctrl-alt-f1).  

The dmesg with drm.debug = 14 is attached for the good and bad kernels.

If more info is needed, just tell me

Tasev

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