[Bug 48092] Video hardware freeze whole system when full screen

[Ignacio Lago Fontán]

Public bug reported:

Binary package hint: linux-image-2.6.15-23-686

Hardware: Compaq Evo N600c (Laptop)
Ubuntu: Dapper Drake LTS (up-to-date)

With kernel 2.6.15-22-686 all is ok. With kernel 2.6.15-23-686 the
system freezes when an application (Frozen Bubble, ScummVM, PyDance...)
changes to fullscreen. In the screen all is abstract, an amount of
pixels without reason, a pattern in diagonals.

Nothing to do with the system. No signal from keyboard (incl. leds), no
acpi functions (power button, etc...).

Tested with kernel: 2.6.15-22-686 (ok), 2.6.15-23-686 (error) in all combinations with:
X manager: Gnome, KDE, Xfce4
X drivers: ati, radeon

How to reproduce (in ex.):
- Start X windows system
- Start PyDance and Press F11

Critical. Some patch in the kernel is dangerous.

** Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

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Video hardware freeze whole system when full screen
https://launchpad.net/bugs/48092