I've experienced this bug at least twice after upgrading my ThinkPad T420 (also with Quadro NVS 4200M graphics) from Kubuntu 11.10 to 12.04 LTS about a week ago.
I also recall seeing a log similar to that in the last bullet point in your initial message being posted every time I open the lid when the problem doesn't occur. If I recall correctly, when the problem occurs and I try to log back in, I can't even get to the desktop. The login process just hangs right before the desktop would come up, forcing a hard reboot (since I could also not access any other text terminal) Seeing the follow lines reference nouveau had puzzled me: [drm] nouveau 0000:01:00.0: 0x7393: i2c wr fail: -6 [drm] nouveau 0000:01:00.0: 0x73A5: i2c rd fail: -6 I would have assumed that the lack of Optimus support would have meant that drivers for the NVIDIA card would not be installed, since only the Intel Integrated Graphics can be accessed, at least under my current BIOS configuration (I don't recall ever installing them myself, and the integrated graphics have been powerful enough for my needs in Linux). Searching in the package manager for "nouveau" reveals that I have the following packages installed: xserver-xorg-video-nouveau libdrm-nouveau1a libdrm-nouveau1a (i386) Judging by the posted Xorg log's (and my Xorg log's) references to the Intel Integrated Graphics and lack of references to the NVIDIA card , I'd say that we both have Optimus and that the operating system is just using the integrated graphics. Interesting that the NVIDIA card appears in both our lspci outputs, though. Perhaps that explains why the drivers were installed. Therefore, my suspicion is that this problem is somehow nouveau and Optimus related. I'm going to try uninstalling the nouveau packages mentioned above and see whether that causes the problem to go away. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1030387 Title: Closing notebook lid can log user out, breaks network manager and more To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1030387/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
