Bug#770660: mate-screensaver: resume from suspend fails in certain circumstances

Mike Gabriel mike.gabriel at das-netzwerkteam.de
Wed Mar 4 11:24:46 UTC 2015

Control: tag -1 - moreinfo

On  Fr 28 Nov 2014 20:21:23 CET, tony mancill wrote:

Hi Tony,

> On 11/25/2014 07:05 AM, Mike Gabriel wrote:
>> Control: tag -1 moreinfo
>> Hi Tony,
>> On  So 23 Nov 2014 04:41:53 CET, tony mancill wrote:
>>> Package: mate-screensaver
>>> Version: 1.8.1-1
>>> Severity: normal
>>> Dear Maintainer,
>>> This could be considered minor, but it is reproducible and slightly
>>> annoying.  To reproduce:
>>> 1) Suspend the laptop while docked in a docking station (with
>>>    multiple monitors, if that makes a difference).
>>> 2) Eject the laptop from the docking station and resume the laptop.
>>> 3) The X display will be hung and no unlock mechanism is visible until
>>>    switching to a Linux console (Ctrl-Alt-F1) and killing the
>>>    /usr/lib/mate-screensaver-gl-helper process.  At this point,
>>>    switching back to console 7 displays the expected lock dialog.
>>> Some other windows managers can handle this - it would great if the MATE
>>> environment didn't get confused.  If it makes a difference, the laptop
>>> has an Intel HD 4000 chipset.
>> To my experience the mate-screensaver "Unlock Screen" dialog always
>> appears on the monitor / screen where the mouse pointer was left.
> Hi Mike,
> That's an interesting observation, and very possibly explains what's
> going on. The behavior you described is the same for me (either docked
> or undocked).  I run with the following configurations:
> docked:
> - (2) external monitors and laptop lid is closed
> - primary display is thus an external monitor
> undocked:
> - just the laptop display (obviously)
> Note that when I suspend while undocked and then dock for the resume, I
> get the unlock dialog on the (external) display, so the current code
> seems "smarter" in this configuration.x
>> for debugging: If you move the mouse over to the notebook's screen, can
>> you then normally unlock your session?
> That would be possible if I opted to run all (3) displays while docked,
> but not with the use case I'm reporting here.  In case it helps, I am
> attaching a screenshot of Monitor Preferences in the docked
> configuration, along with the xrandr output.
>> We won't probably get this fixed for Debian jessie (unless too many
>> people find this too annoying), we will rather have to hand it over to
>> MATE upstream and expect help from there.
> Of course - no worries there.  I really enjoy using MATE and am happy to
> see it packaged and so conveniently accessible for Debian.  This is just
> a minor nit I noticed when switching from other WMs.  Please let me know
> if there is other information I can provide to help with the upstream
> bug report.

we won't get this fixed for jessie, I guess.

However, the issue needs to be reported upstream and handled there.  
Can you write the upstream report [1]? (That would be awesome!)


[1] https://github.com/mate-desktop/mate-screensaver/issues

mike gabriel, herweg 7, 24357 fleckeby
fon: +49 (1520) 1976 148

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mail: mike.gabriel at das-netzwerkteam.de, http://das-netzwerkteam.de

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