Aha, I figured out how to reproduce it on my desktop:
Boot with the alternate CD, go through the installation until it has reformatted the drive and started installing things to /target. Next `chroot /target`, then wait until the file /usr/share/xresprobe/xprobe.sh is present, and then invoke it:
using the xorg.conf from /usr/share/xresprobe/xorg.conf, with "intel" specified as the driver.
So... one solution could be to disable running xprobe.sh for driver "intel". I've attached a patch for this.
However, I think this risks ending up with an improperly configured graphics system. Let me experiment more and see if I can come up with a better solution.
Aha, I figured out how to reproduce it on my desktop:
Boot with the alternate CD, go through the installation until it has reformatted the drive and started installing things to /target. Next `chroot /target`, then wait until the file /usr/share/ xresprobe/ xprobe. sh is present, and then invoke it:
/usr/share/ xresprobe/ xprobe. sh laptop
Boom, colored squares.
Essentially what this script is doing, is running
/usr/bin/Xorg :67 -ac -probeonly -logfile "<logfile>" -config "<config>"
using the xorg.conf from /usr/share/ xresprobe/ xorg.conf, with "intel" specified as the driver.
So... one solution could be to disable running xprobe.sh for driver "intel". I've attached a patch for this.
However, I think this risks ending up with an improperly configured graphics system. Let me experiment more and see if I can come up with a better solution.