[Bug 76211] [hsw] i915 resume latency 1200ms

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=76211

--- Comment #27 from Len Brown <lenb at kernel.org> ---
Created attachment 241901
  --> https://bugzilla.kernel.org/attachment.cgi?id=241901&action=edit
current analyze_suspend output

This problem still exists in Linux-4.8.0, though the delay
on this machine is now 909 ms, rather than 1,200 ms.

Attached, please find the analzye_suspend.py output as run
on the same laptop as above, installed with Ubuntu 16.10
and its 4.8.0-22-generic kernel.

Curiously, i915 resume invokes intel_hdmi_detect FOUR TIMES --
twice in a kthread, and again twice in-line.  This costs 160ms
each time it is invoked.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.