I also confirm this bug with the following experiences: [Laptop, Intel 855 GM]
When I upgraded from Hardy to Lucid, laptop did not boot until I re- enabled KMS (according to https://wiki.ubuntu.com/X/Bugs/Lucidi8xxFreezes ). Everything else then worked almost fine, except it few times unexpectedly crashed (screen flashed -> hard freeze). Video worked fine with some minor problems on external monitor. I started to use a program with 3D graphics and computer was crashing frequently when using external monitor. Then I tried to switch video driver to the older one from PPA X-retro repos. It did not help much (only video with external monitor got better), so I switched back to official Ubuntu driver. After that xv always crashes. Now I use retro - driver (see https://edge.launchpad.net/~ubuntu-x-swat/+archive/x-retro ) with quite success. Problems with external monitor still remain (flickering with login screen, occassional crashes). This steps I had to perform to make my laptop work under Lucid: 1. re-enable KMS ( at least to be able to boot ) 2. downgrade the video driver to avoid video crashes ( it works generally better even when original driver works also) 3. Enable FrameBuffer Device in xorg.conf to avoid crashes on VT switch ( it was the same with Hardy ) 4. avoid using 3D acceleration on external monitor -- [855GM] GPU hang when an application tries to use XVideo https://bugs.launchpad.net/bugs/554835 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
