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

Daniel Vetter daniel at ffwll.ch
Tue Oct 8 09:24:03 CEST 2013

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 Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

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