X2Go Bug report logs - #1172
ThunderBird crashes in PubApp mode on amd64

Package: nx-libs; Maintainer for nx-libs is X2Go Developers <x2go-dev@lists.x2go.org>;

Reported by: Stefan Baur <X2Go-ML-1@baur-itcs.de>

Date: Fri, 5 May 2017 14:40:02 UTC

Severity: normal

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Subject: Bug#1172: Modifier Keys not working as expected
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To: Stefan Baur <X2Go-ML-1@baur-itcs.de>
Cc: 1172@bugs.x2go.org
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On Tue, Sep 26, 2017 at 12:06 PM, Stefan Baur <X2Go-ML-1@baur-itcs.de> wrote:
> package: x2goclient
>
> (devs: feel free to reassign this to nx-libs/arctica, if the cause is
> not in X2GoClient)
>
> A certain application requires the following keypresses:

Is the spplication's name secret?

> - Hold down ctrl, shift and alt
> - while holding them down, press the space bar
> - let go of shift and space bar, keep holding down ctrl and alt

leaving you with ctrl-alt

> - with ctrl and alt pressed, press a function key (F1-F6)
> - let go of all keys
>
> This works when the application is run on :0 - the "ctrl-alt-Fx" is not
> passed down to X, so no switch to tty1-tty6 occurs, which is the
> intended and expected behavior.

So I guess that the application is consuming that very keypress
somehow by communicating with the X server (grab the key(s) in
question).

> However, with the application running in an X2Go session, the same
> sequence of keys will trigger a switch to tty1-tty6 on the local client.

The application probably also communicates with the X server which
this time is nxagent. So nxagent would probably not pass the grab to
the real X server.

You could try if the coming autograb feature helps here.

But for analysis we'd need the application to see what is doing.

For the records: I think it is nx-libs so we should open an issue
there. But I am not sure if we will be able to fix that at all.

Uli

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