Re: [REGRESSION, i915]: Periodic stalls with 2.6.36-rc2

Sitsofe Wheeler
2010-08-24T07:57:46Z

On Tue, Aug 24, 2010 at 01:12:22AM +0100, Chris Wilson wrote:
>
> From the error message, I'd suggest we'd tackle hangcheck - it simply
> shouldn't be firing at all under normal circumstances. (Looking at it we
> don't handle the introduction of the BSD ring correctly, but that is
> irrelevant on the EeePC 900.)
>
> Do the stalls and tearing go away with:

The stalls became a bit better with the patch but there were still very
small pauses but the tearing with more recent X bits is definitely still
there. Additionally videos in totem would play as a tiny one pixel high
row about a quarter of the screen across at the top left of the screen.
It also seems that X has started having trouble refreshing itself so
sometimes new windows are invisible (especially with compiz).

I've also noticed a couple of other things. Sometimes (but without any
pattern) an extra display is detected even though no external display is
plugged in. Here's an example of the xrandr output:
Screen 0: minimum 320 x 200, current 2384 x 768, maximum 4096 x 4096
LVDS1 connected 1024x600+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x600 59.5*+
800x600 85.1 72.2 75.0 60.3 56.2
640x480 85.0 72.8 75.0 59.9
720x400 85.0
640x400 85.1
640x350 85.1
VGA1 disconnected (normal left inverted right x axis y axis)
TV1 disconnected (normal left inverted right x axis y axis)
1360x768 (0xbc) 84.8MHz
h: width 1360 start 1432 end 1568 total 1776 skew 0 clock 47.7KHz
v: height 768 start 771 end 781 total 798 clock 59.8Hz

Sometimes the output is TV1 sometimes it is VGA1 and sometimes these
extra outputs will disappear. Another issue is that switching from X to
a console for the first time causes a LCD "blooming" effect.

--
Sitsofe | http://sucs.org/~sits/