Comment 32 for bug 220345

I'm esperiencing a bug which may be related. I occasionally get a system freeze with ubuntu 8.04, kernel 2.6.24-17-generic, no problems with previous ubuntu releases.
My system is an acer aspire 5024. I'm using the open source driver for my ati mobility radeon x700 graphics card.

I have no video scramble, but a total freeze of the input. The system goes on with his activity, but with a considerable slowdown.
The freeze is very unpredictable, but seems to happen in response to some action, as:
- open a link in firefox
- lauch a virtualbox machine
Sometimes freeze happen very short after system boot up, sometimes after >1h of usage.

What I've tried.
I tried to use a different web browser, but didn't helped.

I've tried to install acer kernel modules:
$ lsmod |grep acer
acer_acpi 18112 0
led_class 6020 2 b43,acer_acpi
wmi_acer 9644 1 acer_acpi
Recently I got similar problems with a vanilla kernel (don't rember version number!) under gobolinux, and acer modules solved them. However, under ubuntu 8.04 that didn't helped at all.

Tried proprietary ati drivers, and didn't helped either.

I will try to plug-in an usb mouse, to see if helps. Let me know if you need some other details.