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Hi
have you solved this problem ? I'm having the same issue. tried all kind of drives on ubuntu 12.10 with several kernels.

well I still get lockups even with gnome shell 3.4.2. so far didn't find any solution. somebody please help

same problem here tried different nvidia drivers + different kernels. gnome 3.4.1 randomly freezes. Ubuntu Devs can you shed some light on this issue ? It's been a while since ubuntu 12.04 came out...

sudo gedit /etc/default/grub
Change the line GRUB_CMDLINE_LINUX="" into
GRUB_CMDLINE_LINUX="acpi_osi=Linux"
sudo update-grub

http://ubuntuforums.org/showpost.php?p=9291657&postcount=1

alright guys I found a solution it is a kernel fault or to be correct the way the kernel is configured. I downloaded fixed kernelcheck from webupd8 site and messed with cpufreq and acpi options and...

tried Parted Magic 5.9 i686 and it boots fine even sees overclock without multiplier. so what's up with ubuntu ?

http://partedmagic.com/doku.php

Hi All,
I got a problem with Ubuntu 10.10/10.04 x64 I can't initial boot. I get kernel machine check exception error (kernel panic not syncing reboot in 30 secs)
My pc is overclocked to 4.4,...