[Bug 99173] Xorg waits for long time(200ms+) to invoke VT_RELDISP

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99173

--- Comment #6 from zhang rui <rui.zhang at intel.com> ---
Hi, Chris and Yann,

the problem was found when we trying to optimize the suspend speed, together
with Len, and we found that the pm_prepare_console step in kernel is quite
slow(some times it takes only 10ms, but in some cases/platforms, it takes
200~1500ms), on several laptops we've tested, and Yu found that the time is
cost when we do a vt switch in pm_prepare_console, and further more, this
latency also applied to all the cases when we want to switch from graphics mode
to text mode. 
And that's why this bug is filed, first in kernel bugilla and then here.

This may or may not be a bug, but
if it is not a bug, we want to know where this 200~1500ms is spent.
if it is a bug, we should keep it open, although I don't know which component
it belongs to.

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