SOLVED!
Dear all,
I had the same problem with an Acer TravelMate 382TMi, which was working perfectly with Ubuntu Desktop 9.10, until I updated (from the GUI) to Ubuntu 10.04 LTS.
Googling around, it seems that the problem was actually well-known:
From Ubuntu 10.04 Release Notes:
http://www.ubuntu.com/getubuntu/releasenotes/1004
>Intel 8xx X freezes/crashes
>The -intel driver fails with X freezes or crashes on certain i8xx hardware. The issue is
>known >upstream but solutions are still under development. For now, to work around
>the issue, boot >with the -vesa video driver.
>See http://wiki.ubuntu.com/X/Bugs/Lucidi8xxFreezes for further details.
By reading on http://wiki.ubuntu.com/X/Bugs/Lucidi8xxFreezes
I re-enabled KMS, and Ubuntu 10.04 worked fine again.
To boot, remember to press/release SHIFT (maybe multiple times helps) AS SOON AS Ubuntu starts booting: that is just before the Ubuntu logo appears.
By doing this, you are asking the boot-loader, Grub, to show you a menu with various boot options.
Choose to boot with the kernel with the the second-highest version number
After having booted up, open a Terminal and type:
Code:
echo options i915 modeset=1 | sudo tee /etc/modprobe.d/i915-kms.conf
sudo update-initramfs -u
Then reboot normally.
I just solved the problem in this way.
Also the message "acer-wmi: no or unsupported wmi interface, unable to load" during boot disappeared: I did NOT change /etc/modules or the like.
If this does not solve your problem (maybe you have a different laptop model),
I would suggest to try out the other methods listed at
http://wiki.ubuntu.com/X/Bugs/Lucidi8xxFreezes
Hope this helps.
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