Bug#542701: xserver-xorg-video-intel: Very slow 2D performance on one screen of dual display until after switch to console VT and back.
On Sun, Feb 28, 2010 at 4:36 PM, Cyril Brulebois <kibi@debian.org>
wrote:
>
> Carl Worth <cworth@cworth.org> (03/09/2009):
> >
> > Thomas Vaughan wrote:
> > >
> > > By the way, I don't mind grabbing the relevant source and building
> > > for debug output, if that would be of any help. I just need to
> > > know how to turn on the relevant output or else where to stick
> > > some printf()s.
> >
> > If you're interesting in building things, one thing you might do is
> > to build a recent kernel and use kernel modesetting, (load the i915
> > module with the option "modeset=1" either on the modprobe command
> > line or by putting "i915 modeset=1" into /etc/modules). It would be
> > interesting to hear if the behavior is identical with a KMS setup.
>
> you should find everything you'd need to test Carl's suggestion in
> unstable, where KMS is automatically enabled. You can check the
> details about kernel versions in the second part of this blogpost:
>
> http://ikibiki.org/blog/2010/02/28/Where_have_you_been/
Thanks for contacting me.
I never followed up on this because the hardware configuration at my
office changed. I still do have the machine with the 82945 video
adapter, but it now has only a single monitor attached, and I'm using
that machine at this point only to serve files.
If there be a ticket open somewhere only because I noticed an anomaly
that no one else cares about, then one might feel free to close it, even
if it be a real anomaly. I don't want to be a source of trouble. :^)
The point is that the 82945 can be made to drive a pair of displays,
each at 1600x1200, with hardware-accelerated 3D.
I got it to work.
Unfortunately, after X started, I had to switch to the text VT and back
to the X screen in order to get the second screen not to be really
sluggish.
Anyway, I don't have time to play with it, at least not for the next few
weeks.
Your message seems to indicate that it should be easy for me to test KMS
now that Debian unstable has everything available for free by default.
That is an interesting bit of news, and so I might get around to playing
with it next month some time.
--
Thomas E. Vaughan
There are only two kinds of people; those who accept dogma and know it,
and those who accept dogma and don't know it. - G.K. Chesterton
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