I had the same error message when using fast user switching. This is with Precise on a MSI WindBox DC-100 (Radeon HD 6320), so not exactly the same circumstances, but this got fixed installing libdrm- radeon1_2.4.46+git20130702.c6d73cfe-0ubuntu0sarvatt~precise (and the rest of the updated pakages) from the xorg-edgers PPA.
According to [0], commit 0980633afd9c7eecc0c75ef3bea4d3c6b7aa1898 in libdrm should be the reason why this is fixed. [0] http://lists.debian.org/debian-x/2013/01/msg00158.html -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/717870 Title: RV710: [drm:radeon_cs_ioctl] *ERROR* Failed to parse relocation -35! To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-driver-ati/+bug/717870/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs