Try to summarize the bug: There are lockup problems using both the free ati driver and the proprietary driver from ATI named fglrx.
For people willing to use the free ATI driver, disabling DRI in the Xorg configuration file seems to solve the problem. Some people who had problems using the free ATI driver didn't see any problem using the proprietary driver (that's my case). Some people didn't see the problem with Ubuntu/Gnome/GDM, but saw it with Kubuntu/KDE/KDM. I'm not sure, but I think it is caused by the way GDM/KDM issue a server reset (or don't) after logout. Even with GDM, I could reproduce the bug by logging out, and then hitting CTRL+ALT+Backspace in GDM. Regarding possible solutions: - for the xorg ati driver: xorg 7.1 includes many changes regarding stability of the ati driver. But we won't get it in Dapper. - the fglrx seems to also include some changes in this area, but lvscar tested and could still reproduce the bug. ** Summary changed: - ATI FireGL V3100: server reset causes hang + Lockup problems with both the free xorg ATI driver and the proprietary fglrx driver, using various ATI cards -- Lockup problems with both the free xorg ATI driver and the proprietary fglrx driver, using various ATI cards https://launchpad.net/bugs/30447 -- kubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
