Computer shuts down after HDMI connected TV is powered off

[Rob Duikersloot]

Binary package hint: acpi

If the connected TV is powered off, Ubuntu (intrepid 8.10) beeps, and shuts down immediately. This happened after I included acpi_osi=Linux in the kernel options. I therefore presume the problem lies there.
If I pull the HDMI plug from the laptop, it does not shutdown. Laptop is a Toshiba A300D.

ProblemType: Bug
Architecture: i386
Dependencies:
 libgcc1 1:4.3.2-1ubuntu12
 gcc-4.3-base 4.3.2-1ubuntu12
 findutils 4.4.0-2ubuntu3
 libc6 2.8~20080505-0ubuntu9
DistroRelease: Ubuntu 8.10
NonfreeKernelModules: fglrx
Package: acpi 1.1-1ubuntu1
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: acpi
Uname: Linux 2.6.27-15-generic i686

[Rob Duikersloot (ropster)]

Here is the dmesg

[Rob Duikersloot (ropster)]

I have moved to Karmic, this one can be closed.