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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Xorg waits for long time(200ms+) to invoke VT_RELDISP"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99173#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Xorg waits for long time(200ms+) to invoke VT_RELDISP"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99173">bug 99173</a>
from <span class="vcard"><a class="email" href="mailto:rui.zhang@intel.com" title="zhang rui <rui.zhang@intel.com>"> <span class="fn">zhang rui</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=131408" name="attach_131408" title="pm_console_suspend delay during suspend">attachment 131408</a> <a href="attachment.cgi?id=131408&action=edit" title="pm_console_suspend delay during suspend">[details]</a></span>
pm_console_suspend delay during suspend
Don't know what kind of info is needed.
This problem can be reproduced on many platforms. here is the analyze_suspend
output on Dell XPS 13 9360, which is a KBL platform, with 4.11 kernel.
As you can see in the ftrace output
python-2517 [003] d... 267.793000: pm_prepare_console_cal:
(pm_prepare_console+0x0/0x40)
python-2517 [000] d... 268.065713: pm_prepare_console_ret:
(pm_suspend+0x1dd/0x3a0 <- pm_prepare_console) arg1=0x0
this is the time cost by switching console during suspend.</pre>
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