Comment 7 for bug 1660619

I'll spill some gasoline on this fire.

I've been suffering from laptop (dell xps 13 w/ skylake) freezes after it shuts down the screen due to inactivity. I call that frezes because when it happens there is no way to wake the screen up. SSH is down. ctrl-alt-f1 and bling-typing is not working. suspend button is not responding. s2ram command is ignorant too. And since I do not have a screen (a laptop, remember?) I try all these things blindly.

So the laptop basically stops responding. Each time (3-5 occurences this year) post mortem analysis reveals that one of last syslog entries is:

syslog.1:9316:Sep 20 20:51:56 netikras-xps kernel: [477714.359255] [drm:intel_pipe_update_end [i915_bpo]] *ERROR* Atomic update failure on pipe A (start=330999 end=331000) time 147 us, min 1788, max 1799, scanline start 1785, end 1801

As you see from the log attached this error occurs rather often. Maybe it's a coincidence, maybe it's not. But I have surely noticed that this error is always one of the last syslog records ante mortem.

Ping me if anyone needs any more details, I'm subscribing to this thread