[Intel-gfx] Broken in 3.10.10 (was: Questions on display pipes on 835GM)

[Daniel Vetter]

On Mon, Oct 7, 2013 at 11:58 PM, Thomas Richter <thor at math.tu-berlin.de> wrote:
>
> Actually, I was testing with the 3.10.10 kernel here. Unfortunately, I need
> to tell you that 3.11.4 and 3.12.0-rc.4 does *not work at all*. All I get on
> these kernel releases is a blank screen, though with a working mouse cursor.
> Apparently, nothing is rendered on the screen at all. Otherwise, it does the
> same as 3.10.10, namely lock up if I connect an external monitor during
> bootstrap.
>
> For 3.12.0-rc.4, if I connect the monitor *after* bootup on the gdm login, I
> first see nothing on the external screen, and the mouse pointer on the
> internal TFT. Then, after logging in blindly, the cursor appears at the
> external monitor, the system beeps and then crashes and hangs.
>
> Thus, sorry, but: broken in 3.11 and up...
>
> Sorry for the bad news, please try try again.

I guess step one is to bisect the regression in 3.11. Fixing things on
top of 3.10 is imo pointless if later kernels break things harder ...
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch