Public bug reported:
OEM LP private bug: https://bugs.launchpad.net/bugs/1466441
Title: Sometimes system turns a black screen when resume from S3 via Lid
Close
Summary:
Sometimes system turns a black screen when resume from S3 via Lid Close
It only has cursor on screen but still can switch to tty1.
Failure rate ~ 1/5
Steps:
1. install Ubuntu 14.04.2 & 3.19+ kernel and boot to OS
2. Close the lid
3. Open the lid
4. check the display status
Expected results: System should resume to the log in screen when open
the lid
Actual results:
System sometimes fails to resume back to the log in screen but blackscreen
instead.
(Failure rate~ 1/5)
Details:
unity-settings-deamon will call "xinput --map-to-output 11 eDP1" at background,
and it's being blocked so only cursor will show on screen.
1. Switch to tty1 when this happen
2. Login with user account on tty1.
3. Use "DISPLAY=:0 xrandr " on commandline you'll see it's being blocked.
Since xinput is being blocked for some unknown reason (in gdb it shows
polling on xcb_connect_to_fd() in XOpenDisplay() ),
a possible workaround is to set a timeout for xinput in u-s-d.
=== modified file 'plugins/xrandr/gsd-xrandr-manager.c'
--- plugins/xrandr/gsd-xrandr-manager.c 2014-06-05 11:56:15 +0000
+++ plugins/xrandr/gsd-xrandr-manager.c 2015-07-01 08:59:56 +0000
@@ -2199,7 +2199,7 @@
if (gnome_rr_output_info_is_active(output)) {
g_debug ("Mapping touchscreen %d onto output %s",
device_id, name);
- sprintf (command, "xinput --map-to-output %d %s",
+ sprintf (command, "timeout 3s xinput --map-to-output %d %s",
device_id, name);
status = system (command);
}
** Affects: oem-priority
Importance: Critical
Status: New
** Affects: oem-priority/trusty
Importance: Critical
Status: New
** Affects: unity-settings-daemon (Ubuntu)
Importance: Undecided
Status: New
** Also affects: oem-priority
Importance: Undecided
Status: New
** Also affects: oem-priority/trusty
Importance: Undecided
Status: New
** Changed in: oem-priority
Importance: Undecided => Critical
** Changed in: oem-priority/trusty
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/1471708
Title:
For skylake system, u-s-d cause a black screen when resume from S3 via
Lid Close
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