Bug#846661: light-locker: screen remains black after unlock

[Ian Jackson]

I'm afraid I have no idea why this might have broken.  I'm no expert
on this desktop type stuff.  Personally I use xtrlock as my
screenlocker.

It is possible that this is related to the cgroups fs problem for
which Michael Biebl applied a patch, and which I have uploaded to
Debian experimental.  You could try systemd-shim 10-3~exp2.

If you find out what the problem is, I would apply a patch to
systemd-shim (if applicable).

Good luck.

Ian.

-- 
Ian Jackson    These opinions are my own.

If I emailed you from an address @fyvzl.net or @evade.org.uk, that is
a private address which bypasses my fierce spamfilter.

Bug#846661: light-locker: screen remains black after unlock

[Gedalya]

reassign 846661 systemd 232-1
thanks

Bug#846661: [Pkg-xfce-devel] Bug#846661: light-locker: screen remains black after unlock

[Gedalya]

On 01/07/2017 10:06 AM, Yves-Alexis Perez wrote:
> On Fri, 2017-01-06 at 22:09 -0500, Gedalya wrote:
>> I've confirmed the problem appeared with systemd 232-1.
>> Downgrading to systemd 231-10 fixes everything.
>>
>> This no doubt has to do with me refusing to use systemd as my init, using
>> sysvinit instead.
> Can you try with systemd as init system and report back, then?
OK, done. Confirmed working. All symptoms gone.
I thought that would be totally obvious so I initially didn't even brother 
reconfirming it for this case.

>> This correlates with the shutdown, reboot, hibernate, suspend items grayed
>> out in lightdm-gtk-greeter being grayed out, being unable to do anything
>> with the network-manager applet inside the user session, etc.
>>
>> These problems have come and gone multiple times in the last couple of
>> years, but this particular issue with light-locker is a first for me.
> Then maybe cgmanager or something in the sysvinit path needs to be updated. In
> any way, it doesn't look like an issue in light-locker.
I wouldn't know exactly what needs to be changed but I know it's all caused by 
systemd.
It's a whole herd of problems all related to privilege escalation. Mounting 
removable media, network-manager, etc. etc.
Now that I've confirmed this it's quite clearly not an issue with light-locker.

Thanks

Bug#846661: [Pkg-xfce-devel] Bug#846661: light-locker: screen remains black after unlock

[Yves-Alexis Perez]

On Fri, 2017-01-06 at 22:09 -0500, Gedalya wrote:
> I've confirmed the problem appeared with systemd 232-1.
> Downgrading to systemd 231-10 fixes everything.
> 
> This no doubt has to do with me refusing to use systemd as my init, using
> sysvinit instead.

Can you try with systemd as init system and report back, then?
> 
> This correlates with the shutdown, reboot, hibernate, suspend items grayed
> out in lightdm-gtk-greeter being grayed out, being unable to do anything
> with the network-manager applet inside the user session, etc.
> 
> These problems have come and gone multiple times in the last couple of
> years, but this particular issue with light-locker is a first for me.

Then maybe cgmanager or something in the sysvinit path needs to be updated. In
any way, it doesn't look like an issue in light-locker.

Regards,
> 
-- 
Yves-Alexis

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Bug#846661: [Pkg-xfce-devel] Bug#846661: light-locker: screen remains black after unlock

[Gedalya]

On 12/07/2016 03:22 AM, Yves-Alexis Perez wrote:
> It's unlikely to be in light-locker/lightDM, try to check what's upgraded in
> the Xorg stack (xserver, driver etc.).
>
>

I've confirmed the problem appeared with systemd 232-1.
Downgrading to systemd 231-10 fixes everything.

This no doubt has to do with me refusing to use systemd as my init, using 
sysvinit instead.

This correlates with the shutdown, reboot, hibernate, suspend items grayed out 
in lightdm-gtk-greeter being grayed out, being unable to do anything with the 
network-manager applet inside the user session, etc.

These problems have come and gone multiple times in the last couple of years, 
but this particular issue with light-locker is a first for me.

See also #799890, #804165, #770885 to name a few.

Bug#846661: [Pkg-xfce-devel] Bug#846661: light-locker: screen remains black after unlock

[Yves-Alexis Perez]

On Sat, 2016-12-03 at 00:46 -0500, Gedalya wrote:
> Reverting lightdm back to 1.18.2-2 didn't help.
> Also I wasn't able to unlock per #846278 using 'loginctl unlock-session
> {X}', however my init is sysvinit, so maybe that's an issue.

It's unlikely to be in light-locker/lightDM, try to check what's upgraded in
the Xorg stack (xserver, driver etc.).

Regards,
-- 
Yves-Alexis

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Bug#846661: light-locker: screen remains black after unlock

[Gedalya]

Reverting lightdm back to 1.18.2-2 didn't help.
Also I wasn't able to unlock per #846278 using 'loginctl unlock-session {X}', 
however my init is sysvinit, so maybe that's an issue.

Bug#846661: light-locker: screen remains black after unlock

[Gedalya]

Package: light-locker
Version: 1.7.0-3
Severity: important

After pulling a bunch of new packages from sid - xorg-server-core, mesa, and 
dbus, light-locker stopped working.
When unlocking, after putting in my credentials the screen remains black.
Killing the process brings the desktop back.

Attaching debug output.

I'm using XFCE.


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.8.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages light-locker depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.26.0-2
ii  libc62.24-7
ii  libcairo21.14.6-1.1
ii  libdbus-1-3  1.10.14-1
ii  libdbus-glib-1-2 0.108-1
ii  libglib2.0-0 2.50.2-2
ii  libgtk-3-0   3.22.4-1
ii  libpango-1.0-0   1.40.3-3
ii  libpangocairo-1.0-0  1.40.3-3
ii  libsystemd0  232-6
ii  libx11-6 2:1.6.3-1
ii  libxext6 2:1.3.3-1
ii  libxss1  1:1.2.2-1
ii  lightdm  1.18.2-3

light-locker recommends no packages.

light-locker suggests no packages.

-- no debconf information

$ light-locker --debug
[gs_debug_init] gs-debug.c:106 (00:20:03):   Debugging enabled
[main] light-locker.c:142 (00:20:03):initializing light-locker 1.7.0
[main] light-locker.c:144 (00:20:03):lock after screensaver 5
[main] light-locker.c:145 (00:20:03):late locking 0
[main] light-locker.c:146 (00:20:03):lock on suspend 1
[main] light-locker.c:147 (00:20:03):lock on lid 0
[main] light-locker.c:148 (00:20:03):idle hint 0
[query_session_id] gs-listener-dbus.c:2088 (00:20:03):   
org.freedesktop.login1.NoSessionForPID raised:
 PID 8711 does not belong to any known session


[init_session_id] gs-listener-dbus.c:2180 (00:20:03):Got session-id: (null)
[query_sd_session_id] gs-listener-dbus.c:2164 (00:20:03):Couldn't 
determine our own sd session id: No such file or directory
[init_session_id] gs-listener-dbus.c:2185 (00:20:03):Got sd-session-id: 
(null)
[init_seat_path] gs-listener-dbus.c:2262 (00:20:03): Got seat: 
/org/freedesktop/DisplayManager/Seat0
[gs_listener_delay_suspend] gs-listener-dbus.c:449 (00:20:03):   Delay suspend
[gs_listener_x11_acquire] gs-listener-x11.c:172 (00:20:03):  ScreenSaver 
Registered
[listener_dbus_handle_system_message] gs-listener-dbus.c:1330 (00:20:03):   
 obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus 
method=NameAcquired destination=:1.127
[gs_grab_grab_root] gs-grab-x11.c:647 (00:20:09):Grabbing the root 
window
[gs_grab_get_keyboard] gs-grab-x11.c:153 (00:20:09): Grabbing keyboard 
widget=4B5
[gs_grab_get_mouse] gs-grab-x11.c:213 (00:20:09):Grabbing mouse 
widget=4B5
[gs_manager_create_windows_for_screen] gs-manager.c:548 (00:20:09):  
Creating 1 windows for screen 0
[gs_manager_create_window_for_monitor] gs-manager.c:324 (00:20:09):  
Creating window for monitor 0 [0,0] (1920x1080)
[update_geometry] gs-window-x11.c:197 (00:20:09):got geometry for 
monitor 0: x=0 y=0 w=1920 h=1080
[update_geometry] gs-window-x11.c:210 (00:20:09):using geometry for 
monitor 0: x=0 y=0 w=1920 h=1080
[update_geometry] gs-window-x11.c:197 (00:20:09):got geometry for 
monitor 0: x=0 y=0 w=1920 h=1080
[update_geometry] gs-window-x11.c:210 (00:20:09):using geometry for 
monitor 0: x=0 y=0 w=1920 h=1080
[gs_window_move_resize_window] gs-window-x11.c:243 (00:20:09):   Move and/or 
resize window on monitor 0: x=0 y=0 w=1920 h=1080
[update_geometry] gs-window-x11.c:197 (00:20:09):got geometry for 
monitor 0: x=0 y=0 w=1920 h=1080
[update_geometry] gs-window-x11.c:210 (00:20:09):using geometry for 
monitor 0: x=0 y=0 w=1920 h=1080
[gs_window_move_resize_window] gs-window-x11.c:243 (00:20:09):   Move and/or 
resize window on monitor 0: x=0 y=0 w=1920 h=1080
[update_geometry] gs-window-x11.c:197 (00:20:09):got geometry for 
monitor 0: x=0 y=0 w=1920 h=1080
[update_geometry] gs-window-x11.c:210 (00:20:09):using geometry for 
monitor 0: x=0 y=0 w=1920 h=1080
[gs_window_move_resize_window] gs-window-x11.c:243 (00:20:09):   Move and/or 
resize window on monitor 0: x=0 y=0 w=1920 h=1080
[gs_manager_timed_switch] gs-manager.c:445 (00:20:09):   Start switch to 
greeter timer
[gs_window_xevent] gs-window-x11.c:369 (00:20:09):   not raising our windows
[window_map_event_cb] gs-manager.c:233 (00:20:09):   Handling window