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[Bug 1305586] Re: Lock screen is unusable when some windows have a keyboard/mouse grab

To: dx-packages@xxxxxxxxxxxxxxxxxxx
From: Christopher Townsend <christopher.townsend@xxxxxxxxxxxxx>
Date: Wed, 18 Jun 2014 14:12:53 -0000
Reply-to: Bug 1305586 <1305586@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Description changed:

+ [Impact]
+
+ Some windows will grab the keyboard/mouse and when the lockscreen kicks
+ in, this window will still have the grab and thusly, ou can enter your
+ password in the lockscreen.
+
+ [Test case]
+
+ 1. Open a window that will hold the grab, such as the ssh password dialog.
+ 2. Wait for the lock screen to activate.
+ 3. Enter your password to unlock the screen.
+
+ [Regression potential]
+
+ This particular fix doesn't fix all cases, but does fix it for some.
+ That said, no new regressions are expected.
+
+ Original Description:
+
My screen just timed out and locked when a password prompt which had a
grab was displaying.

I couldn't type my password or interact with the indicators.

gnome-screensaver just refuses to lock in this situation, perhaps unity
could do the same unless it's possible to remove and readd the grabs
yourself, but I don't think XLib lets you do that (you can only remove
your own grabs AFAIK).

TEMPORARY WORKAROUND TO LOGIN AGAIN:
Click on the guest session
Once the guest session is started log out
This takes you back to the lightdm session screen you can then login to your user session and it be in the same state

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.0+14.04.20140409-0ubuntu1 [origin: unknown]
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CrashDB: unity
CurrentDesktop: Unity
Date: Thu Apr 10 09:39:45 2014
InstallationDate: Installed on 2012-10-07 (549 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64 (20121007)
SourcePackage: unity
UpgradeStatus: Upgraded to trusty on 2013-05-07 (338 days ago)

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https://bugs.launchpad.net/bugs/1305586

Title:
Lock screen is unusable when some windows have a keyboard/mouse grab

Status in Compiz:
Fix Committed
Status in Compiz 0.9.11 series:
In Progress
Status in Unity:
Fix Committed
Status in Unity 7.2 series:
In Progress
Status in “compiz” package in Ubuntu:
Fix Released
Status in “unity” package in Ubuntu:
Fix Released

Bug description:
[Impact]

Some windows will grab the keyboard/mouse and when the lockscreen
kicks in, this window will still have the grab and thusly, ou can
enter your password in the lockscreen.

[Test case]

1. Open a window that will hold the grab, such as the ssh password dialog.
2. Wait for the lock screen to activate.
3. Enter your password to unlock the screen.

[Regression potential]

This particular fix doesn't fix all cases, but does fix it for some.
That said, no new regressions are expected.

Original Description:

My screen just timed out and locked when a password prompt which had a
grab was displaying.

I couldn't type my password or interact with the indicators.

gnome-screensaver just refuses to lock in this situation, perhaps
unity could do the same unless it's possible to remove and readd the
grabs yourself, but I don't think XLib lets you do that (you can only
remove your own grabs AFAIK).

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