Regression in intel driver

[Tom Evans]

Hi all

I've been using the intel xorg driver for quite some time now, and
recently upgraded Xorg server/drm/intel driver to the most current
available in ports. This has caused a significant performance regression
when running without direct rendering enabled, which is required with
this driver to achieve Virtual desktop with a dimension greater than
2048 pixels. Xorg now chews through 30-35% CPU whilst tailing a log
file, where as before this used 3-4%. The effect is visibly noticeable
(and doesn't just apply to fast moving text!)

I have an HP laptop with a 1400x1050 LVDS panel, with a 1280x1024 TFT
attached to the VGA port. My preferred setup is:

xrandr --output LVDS --mode 1400x1050 --output VGA --mode 1280x1024 --left-of LVDS

What I am running now, the only way to get sane performance:

xrandr --output LVDS --mode 1024x768 --output VGA --mode 1280x1024 --above LVDS

I've tried reverting back to an older driver, but it seems that changes
to libdrm prevent that. I fear I may have to roll back drm, mesa,
xorg-server et al just to use a different driver version.

Any tips?

Cheers

Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 195 bytes
Desc: This is a digitally signed message part
Url : http://lists.freebsd.org/pipermail/freebsd-x11/attachments/20080923/3e29742f/attachment.pgp