Hello! I found my system freeze mostly during starting up X and KDE. Sometimes it works for some minutes, sometimes it freezes immediatly. When the freeze happens, everything is dead (even the reset button does not work, I need to power cycle). I was using libdrm-2.4.27 before, system freeze showed some colorful lines running down at the left side of the screen after turning black, then some blue flicker in the top 10% of the the screen. System no longer reacts, network is dead too. Now, using libdrm-2.4.29, the system freeze shows other effects: Screen does not turn black but starts to flicker and occassionally moves some centimeters to the right (wrapping the right-most part to the left) for a very short time, then jumping back with some distortions. The rest is the same: Complete freeze, even reset button stops working. Before finding out about the libdrm difference, I tried other intel xorg driver versions to no avail, I tried with SNA support and without. No difference. I'm now back to intel xorg driver 2.17.0. I read about the semaphores feature, turned it off: No change. Sometimes the system even freezes before displaying the framebuffer splash. I didn't have such issues with early 3.2 rcs (afair), and not with 3.1 kernels. After some digging through google I've found you enabled RC6 in 3.2. I disabled it now, and my system runs wonderfully. Do you need any specs? I'd be happy to send these. The system is a Z68 Pro board with Sandybridge i5-2500K processor, 8 GB of RAM and UEFI firmware. Looks like RC6 is not ready for roll-out, at least on some mainboards. Regards, Kai
