Hello, we expierenced the same issue on a Nexcom NISE 3500M2E industrial computer (http://www.nexcom.com/Products/industrial-computing-solutions /fanless-computer/high-performance-platform/fanless-computer-nise- 3500m2e) running kubuntu 12.04
We observed a lot of EDID activity in the Xorg log when the system lags. With kernel 3.2.0-29-generic-pae i686 i386 this happens some seconds after the UI came up. With the kernel options i915.i915_enable_rc6=0 i915.i915_enable_fbc=0 i915.semaphores=1 i915.modeset=1 the system works stable until we are using a bt878 based framegrabber hardware with direct overlay (XVideo). XVideo is necessary to keep the latency short (its in a robitic application, the system is behind the operator's console). As a current work around, we are using Kernel 3.5.3 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.3-quantal/. the system is far more stable but the lags still happen from time to time. This seems to be in conjunction with i2c bugs fixed in the i915 kernel driver. Regards Florian -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/914216 Title: [arrandale] xorg very laggy when Intel vt-d is enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/914216/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
