[ltp] x.org 7.0 + radeon + mergedfb = crashes?

[Marius Gedminas]

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Hi,

For quite some time now I've been using a dual-head setup (MergedFB) on
my T42 laptop, which has a Radeon Mobility 7500 video card.  After
upgrading to Ubuntu Dapper Drake (about a week before the final release)
I started having problems: using xrandr to switch from a dual-head
config to 1024x768 clone mode often causes the system to freeze hard.
Nothing works then -- no Ctrl+Alt+Backspace, no magic SysRq, no ACPI
events.  The external monitor displays a strange pattern:

  http://mg.pov.lt/P6010010.JPG

Has anyone else experienced problems like this?

Marius Gedminas

P.S. I've created a bug report here: https://launchpad.net/bugs/47775
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