lkml.org 
[lkml]   [2020]   [May]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Date
SubjectSystem fails to exit s2idle by a keystroke on my laptop
Hi,
I have an Intel X5-Z8350 laptop which used to work fine on s2idle
enter/exit with kernel 5.3. After upgrading to kernel 5.4 and later,
the system can still exit s2idle by power button. However, if I try to
wake it up from a keystroke, the system will freeze and then no longer
respond even to the power button. I can only shut it down and power on
again.

I tried to 'git bisect' to find out which commit causes the
difference, it shows me the commit "ACPI: PM: s2idle: Prevent spurious
SCIs from waking up the system". My laptop can work as usual to exit
s2idle by a keystroke with reverting it on kernel 5.4.

Then I tried to check whether I can reproduce it on the latest
mainline kernel, the same problem still there. But I can not fix it by
simply reverting. I found the acpi_s2idle_wake() has been refined on
the latest mainline kernel, and I have to make modifications as
follows to make my laptop work.

@@ -1024,7 +1024,7 @@ static bool acpi_s2idle_wake(void)
* regarded as a spurious one.
*/
if (!acpi_ec_dispatch_gpe())
- return false;
+ return true;

/*
* Cancel the wakeup and process all pending events in case
Maybe there's something special on my laptop so a keystroke is
considered as a spurious event on this machine? Don't know if the DSDT
helps or not.
https://gist.github.com/mschiu77/de8af6da78be12cf442853e7747f76ed

Please let me know if there's anything I can help to address this
problem. Thanks

Chris

\
 
 \ /
  Last update: 2020-05-04 19:11    [W:0.080 / U:0.140 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site