[Intel-gfx] ILK output training hangs

[Jin, Gordon]

Dave Airlie wrote on Monday, August 02, 2010 6:39 PM:
> On Mon, Aug 2, 2010 at 7:09 PM, Jin, Gordon <gordon.jin at intel.com>
> wrote: 
>> Dave Airlie wrote on Friday, July 30, 2010 2:13 PM:
>>> Current testing machine is an HP 2740p with Ironlake graphics.
>>> 
>>> Test sequence:
>>> 
>>> boot with no VGA plugged in.
>>> get up to gnome logged in,
>>> plug in VGA,
>>> 
>>> one of three things occur,
>>> a) it works,
>>> b) it hangs in FDI link training (endless while loop wtf?)
>>> c) it gets past the hang but nothing on the monitor.
>>> 
>>> If (a) happens and I suspend/resume the monitor invariably gets
>>> wrong timings, in this case it appears we set the fbcon mode, but
>>> when we go to change to the X mode, the PCH DPLL won't accept the
>>> new values. 
>>> It won't even dpms off.
>>> 
>>> Just posting in case anyone else can reproduce or has any insight,
>>> I'm not running a fully upstream kernel (testing on RHEL6 with lots
>>> of backports). and we don't  seem to have a tree with all the
>>> patches on the list collected.
>> 
>> I can't reproduce it on Thinkpad T410 (also with Ironlake graphics)
>> with 2.6.35-rc6 kernel. I've performed 10 times of the test
>> sequence.  
> 
> Does the T410 have eDP? I think it only matter with eDP where the FDI
> isn't setup by the BIOS.

No, my T410 has LVDS not eDP. Would you file a bug on fd.o so it could be tracked?

Thanks
Gordon