[Intel-gfx] 3.0 (or SNA?) regression: failed to train DP, aborting

[Andrew Lutomirski]

On Sat, Jul 23, 2011 at 2:40 PM, Andrew Lutomirski <luto at mit.edu> wrote:
> I have a Q67 (DQ67SW board) attached to a Dell U2711 via DP.  In
> previous kernels, the DP link has worked flawlessly.  I just booted
> 3.0-final and simultaneously enabled SNA, and now when my screen goes
> to sleep I don't get an image back until I power cycle the monitor.
> dmesg says:
>
> [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>
> I don't know whether this is a 3.0 regression or whether it's
> triggered by SNA, but something broke.

It's not SNA.  Building with --disable-sna doesn't help.

>
> --Andy
>