After upgrade from R3.0 to R3.2-rc2, my T520 started rebooting randomly a few times a day. Sometimes after 10 minutes of running, sometimes after 12 hours, but always with nothing in logs.
After a long and boring investigation I have found out it was triggered by connecting external monitor and it can be fixed by disabling the Intel i915 RC6 feature (some power saving stuff). Since I've added i915.enable_rc6=0 as a kernel parameter (GRUB_CMDLINE_LINUX in /etc/default/grub) I have a 50 hours of uptime and counting :-) Affected hardware: Lenovo ThinkPad T520 cpu: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz chipset: Mobile Intel QM67 Express gpu: Intel HD Graphics 3000 Relevant results from lspci: 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) Qubes 3.2-rc2, kernel 4.4.14-11 Does anyone else have similar issue with i915? -- yaqu -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/20160922213719.41769103DFC%40mail2.openmailbox.org. For more options, visit https://groups.google.com/d/optout.