On the Dell XPS 13 9350 Developer Edition[1] model, I've been experiencing random system-wide hard crashes that bring the entire machine down. Symptoms: * screen goes blank * screen does NOT turn off * keyboard backlight still works and reacts to keypresses * caps lock LED does not respond, SysRq rebooting does not respond * network connectivity stops (no ping reply) I don't have a crash log, since the machine goes down before anything gets logged (if anything gets logged). I tried to dmesg -w | netcat to another machine and nothing is received. I have almost reliably reproduced the issue like this: 1) open chromium 2) go to http://speedtest.xfinity.com When i915.enable_rc6=0, the problem apparently disappears (still running more extensively to be sure). Tested with: 4.5.0 4.6.0-rc5 4.6.0-rc6 4.6.0-rc6 drm-intel-nightly (871c895) Running 64-bit, OpenSUSE Tumbleweed, connected to the internal display panel only (eDP). I have the latest firmwares. SKL i7-6560U, graphics is 8086:1926 (glxinfo reports "MESA DRI Intel(R) Iris Graphics 540 (Skylake GT3e)"). [1] http://www.dell.com/us/business/p/xps-13-9350-laptop-ubuntu/pd
Thiago - I'm really sorry about this long time until getting back to you. Do you still have this problem with the latest kernel(s), preferable generated from drm-tip? And with the new data please provide also full dmesg (add drm.debug=0x1e log_buf_len=1M to your kernel command line). Since your problem seems to disappear with i915.enable_rc6=0, that might indicate that this bug is duplicate of Bug 94161, problem being that it was marked as fixed by commit done on April 4, 2016.... so I did not mark this as duplicate, at least not before getting more info from you.
No, this problem is gone. Most of the issues I had with the GPU were solved in the 4.6.x patch series. There are still some problems relating to DP-MST and USB-C, but they're not this bug.
(In reply to Thiago Macieira from comment #2) > No, this problem is gone. Most of the issues I had with the GPU were solved > in the 4.6.x patch series. > > There are still some problems relating to DP-MST and USB-C, but they're not > this bug. Thanks Thiago for this feedback
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