[winswitch] KDE + Xpra problem (was: xpra doesn't handle menus)

[Antoine Martin]

You are hitting this unfixed KDE bug:
https://bugs.kde.org/show_bug.cgi?id=274485
Which the developers do not seem to understand or want to fix.
I can only suggest that you avoid KDE until this is resolved, sorry.

Antoine


On 03/23/2012 07:12 PM, Antoine Martin wrote:
> On 03/23/2012 06:33 PM, Neal Becker wrote:
>> I'm using kde for desktop (4.8.1), if that matters.
>>
>> What I told you is not quite accurate.
>>
>> 1. xpra attach ssh:nbecker6:100
> Using ssh *should not* make much of a difference, certainly not a
> complete failure to display like you are reporting.
> 
> Is there anything in the xpra server log at all?
> 
>> This attaches to 'konsole' on remote.
>> The cursor changes as I mouse over the menu, but left click on a menu
>> does nothing.  I see in .xsession-errors (and the mod time is quite recent):
>>
>> QObject: Cannot create children for a parent that is in a different thread.
>> (Parent is Soprano::Client::LocalSocketClient(0x255b998), parent's
>> thread is QThread(0x23d8330), current thread is
>> RankingsUpdateThread(0x2599e30)
> This error comes from the Qt application itself.
> Why it would encounter this sort of problems when xpra is its window
> manager, I have absolutely no idea!
> But there were some qt/kde theming fixes in the past few months and I am
> running Fedora 16 here (which has them) whereas Fedora 15 may not have
> them (yet)..
> 
>> Now from that konosole, launch emacs.
>> Cursor changes from i-beam to X, as I move from text area to the window
>> frame.  But click on a menu does nothing.  .xsession-errors seems to
>> have a new modtime, and I see the same message as above.
> I am installing the full KDE on a Fedora 15 virtual machine to test.
> 
> Cheers
> Antoine
> 
> PS: emacs 24 from source also works fine.
> 
> 
> 
>>
>> On Fri, Mar 23, 2012 at 6:08 AM, Antoine Martin <antoine at nagafix.co.uk
>> <mailto:antoine at nagafix.co.uk>> wrote:
>>
>>     On 03/23/2012 02:26 AM, Neal Becker wrote:
>>     > I tried with both emacs GNU Emacs 24.0.93.1 and with konsole.
>>     I've just tried with the default Fedora 16 Emacs (23.3.1) which worked
>>     fine. I am now installing emacs 24 from source. (600MB d/l - slow DSL..)
>>     I've also tried konsole v2.8.1, and still no problem..
>>
>>     There must be something different about your environment that makes it
>>     fail. Maybe your desktop's environment variables are interfering.
>>     Can you try launching the applications from a "clean" session, ie: one
>>     with a sanitized environment (maybe via ssh to localhost to clear it?).
>>
>>     Antoine
>>
>>     > konsole is Qt, but it looks like emacs is gtk.
>>
>>     >
>>     > As mouse cursor goes over the menu, the cursor does not change,
>>     and the
>>     > menu is not sensitive.  Click on 'File' for example does nothing.
>>     >
>>     >
>>     > On Thu, Mar 22, 2012 at 3:04 PM, Antoine Martin
>>     <antoine at nagafix.co.uk <mailto:antoine at nagafix.co.uk>
>>     > <mailto:antoine at nagafix.co.uk <mailto:antoine at nagafix.co.uk>>> wrote:
>>     >
>>     >     On 03/22/2012 09:18 PM, Neal Becker wrote:
>>     >     > Looks like xpra-0.1.0 is useless on Fedora 16.  Nothing
>>     happens when
>>     >     > clicking on menus - which seems to be a pretty serious problem.
>>     >     Are you talking about xpra's own tray menu or about a specific
>>     >     application you are running through xpra and which is having
>>     problems
>>     >     displaying its own menus properly? And if the latter, which
>>     application
>>     >     is it? Does it happen with other applications?
>>     >
>>     >     Is it a Qt application by any chance?
>>     >     If this is the case then this may well be a theme/style
>>     problem which
>>     >     can be remedied using an environment variable I just cannot
>>     find right
>>     >     now...
>>     >     Note for those who hit this issue, you may be able to get those Qt
>>     >     styles to work properly using an Xvfb server with the required
>>     >     extensions, ie:
>>     >     https://xpra.org/Xdummy.html
>>     >
>>     >     Cheers
>>     >     Antoine
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>>
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