I think I have the same problem. I just built a system using an Asrock Z68 Pro motherboard (Intel Z68 chipset) and an Intel i5-2500K (sandybridge). When using a PCI graphics card, things work fine (and I'm sure they would with a PCIe card, as well). When using the sandybridge's GPU, Ubuntu locks up frequently.
I do not experience any problems using the GRML live CD, which I assume is using a generic VESA mode driver. I can double check on this. Ubuntu 11.04 x64 Live CD locks up before I see the desktop. Installed 11.04 using the x64 minimal CD and the installed appeared to go fine. Booting with the sandybridge graphics sometimes locks with the splashscreen, before GDM has loaded. If GDM loads, it locks immediately after login before a desktop appears if I choose any of the 3D accelerated options. I have not tried safe mode or 2D Ubuntu Classic, but Unity 2D worked for 5 or 10 minutes before locking up. When it locks up, the screen usually goes black with a strip up the left side showing a bit of random pixel blicking. I don't yet have OpenSSH installed, so I can't check if it's still responsive that way. The keyboard definitely does nothing, as Num Lock and Caps Lock keys don't even cycle the LEDs. I'm using a PS2 keyboard. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/740593 Title: [sandybridge-m-gt2 ] GPU lockup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/740593/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
