doing what Felix proposed at #16 didn't work on natty (2.6.38-8-generic): # echo 1 > /sys/module/i915/parameters/semaphores -bash: echo: write error: Invalid argument
However, doing what proposed on #18 solved the problem. XPS L502X with optimus/bumblebee working -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/761065 Title: [Sandybridge] Spurious "*ERROR* Hangcheck timer elapsed... blt ring idle" messages in dmesg when using compiz _______________________________________________ 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