[X2Go-User] Cross-session copy/paste issue

Tue Feb 23 05:35:10 CET 2021

Thank you Uli. Slight modification:

git archive -o ~/rpmbuild/SOURCES/nx-libs-3.5.99.26.tar.gz
--prefix=nx-libs-3.5.99.26/
pr/many_clipboard_changes

Build worked fine.

Installed:

sudo rpm -i --force nxagent-debuginfo-3.5.99.26-0.0build1.fc33.x86_64.rpm
nx-libs-debuginfo-3.5.99.26-0.0build1.fc33.x86_64.rpm

I logged out of two of my sessions, then restarted them- am still not able
to copy paste between them.

Should that now work?

If so, is there something I can pull out of the logs?

On Mon, Feb 22, 2021 at 3:32 PM Ulrich Sibiller <uli42 at gmx.de> wrote:

> On Sun, Feb 21, 2021 at 7:22 PM Jonah Benton <jonah at jonah.com> wrote:
>
> > Thank you- concur about images- in the past, copy-paste of them only
> worked within a session, not across. My workaround was to paste-save to
> /tmp on the host and then open saved image from another session. But nearly
> all copy-paste for me is text / URLs.
>
> Ah, ok. But that's not really comfortable or seamless...
>
> > Re versions of nxagent:
>
> So you did an update from 3.5.99.24 to 3.5.99.26. There were minimal
> changes in the range (only 5 commits):
> eb7b9773 nxagent: make nxagentXFixesInfo.Initialized a Boolean
> fec462906 nxagent: treat all Traps as Booleans everywhere
> b07b6c537 Clipboard.c: fix bug in special optimization for nested settings
> ebee6af05 Clipboard.c: add missing ifdefs
> edb5a918a Clipboard.c: fix missing )
> ae037701f nxagent: fix stack smashing
>
> > I can try to downgrade if there is an earlier 3.5.99 on Fedora 33- will
> that matter?
>
> Probably not, but why not try it?
>
> > Happy to give a go at a replacement build.
>
> Ok, here's the branch you should compile:
> https://github.com/uli42/nx-libs/tree/pr/many_clipboard_fixes
>
> Generally you need to do this:
> 1. git clone https://github.com/uli42/nx-libs/tree/pr/many_clipboard_fixes
> 2. cd nx-libs
> 3. mkdir -p ~/rpmbuild/{SOURCES,RPMS,SRPMS,OTHER,BUILD}
> 4. git archive -o ~/rpmbuild/SOURCES/nx-libs-3.5.99.26.tar.gz
> --prefix=nx-libs-3.5.99.26/ 3.6.x
> 5. cp --preserve=time nx-libs.spec ~/rpmbuild/SOURCES
> 6. rpmbuild -ba ~/rpmbuild/SOURCES/nx-libs.spec
> 7. install the resulting nxagent rpm
>
> I do not have a fedora at hand so I could not test this. In case of
> problems you can also try the spec file from the fedora build.
>
> > I did just note two additional behaviors-
> >
> > 1. cross-session paste does *eventually* complete
> >
> > -copy of text 1 in session 1
> > -attempt to paste in session 2
> > -observe session 2 window freeze
> > -switch to host window
> > -paste into host window (success)
> > -select and recopy in host window
> > -switch back to session 2- paste of text 1 had completed
> >
> > So the paste took about 5 seconds
>
> My branch adds some caching of clipboard communication which speeds up
> operations like this considerably.
>
> > 2. cross-session paste payload can be replaced in flight
> >
> > -copy of text 1 in session 1
> > -switch to session 2
> > -attempt to paste (text 1 into session 2)
> > -observe session 2 window freeze
> > -switch to another window in session 2
> > -select and copy text 2 (in another window in session 2)
> > -switch to the session 2 window attempting to complete the original paste
> > -note that the paste completed- but using text 2, not text 1
>
> That's one of the big changes in my branch. Previously the code was
> sharing some variables for all clipboards and the behaviour you are
> describing here is just the result of that.
>
> Uli
>
>
> >
> > Thanks again!
> >
> > Jonah
> >
> >
> > On Sun, Feb 21, 2021 at 7:59 AM Ulrich Sibiller <uli42 at gmx.de> wrote:
> >>
> >> Well, I am wondering how you managed to reliably copy/paste images.
> This is something the current code does not support.
> >>
> >> Regarding the switch to non-working: you probably have updated the
> nxagent package on your server. Please check what was the old version and
> what you have installed now. You could try to downgrade again. But please
> post the versions here anyway.
> >>
> >> I am still working at a massive clipboard rework which is close to
> being finished (I hope...). If you are able to compile it on your own you
> can test it. I can assist with instructions
> >>
> >> Uli
> >>
> >> Jonah Benton <jonah at jonah.com> schrieb am Sa., 20. Feb. 2021, 20:30:
> >>>
> >>> Hi folks,
> >>>
> >>> Let me first say thank you to X2Go maintainers- I happened upon X2Go
> about 6 months ago when figuring out how to switch my workflow from Fedora
> VMs on MacOS to distinct desktop environments on Fedora. It is such a
> profoundly excellent tool. Thank you for your efforts.
> >>>
> >>> Now- to describe a problem that just cropped up, hoping someone can
> help me debug.
> >>>
> >>> I have been running Fedora 32 - XFCE on a Thinkpad, simultaneously
> running 7 distinct local X2Go sessions under 7 different host users. Each
> session's window resides within its own XFCE logical desktop, and I switch
> between them with the switch desktop hotkeys. X2Go sessions are configured
> to support bidirectional copy/paste, and generally it works seamlessly to
> copy text or images from apps in one session's window to another or to/from
> the host.
> >>>
> >>> Last night I upgraded to Fedora 33, with the requisite updates to
> X2Go. Now, copy/paste is reliably broken in one area:
> >>>
> >>> * from host into any session still is fine
> >>> * from session into host still is fine
> >>> * from a session into the same session still is fine
> >>> * from one session into another session no longer works
> >>>
> >>> On failed pastes- where the copy was from one session and the paste is
> another session- when the paste recipient is a browser (Chromium, Firefox,
> whatever), sometimes the recipient browser tab temporarily locks up trying
> (and failing) to retrieve the paste material.
> >>>
> >>> All X2Go sessions are still configured for bi-directional copy-paste.
> >>>
> >>> [admin at localhost ~]$ x2goclient --version
> >>> x2go-WARNING-1> English language requested, not loading translator.
> >>> x2go-WARNING-1> English language requested, not loading translator.
> >>> 4.1.2.2
> >>>
> >>> [admin at localhost ~]$ x2goversion
> >>> : 3.2.0.0
> >>> : 4.1.0.3
> >>> : 4.1.0.3
> >>> : 3.2.0.0
> >>> : 4.1.0.3
> >>> : 3.5.99.26
> >>> : 4.1.0.3
> >>>
> >>> Any thoughts on tracking down the issue?
> >>>
> >>> Thanks again,
> >>>
> >>> Jonah
> >>>
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> x2go-user mailing list
> >>> x2go-user at lists.x2go.org
> >>> https://lists.x2go.org/listinfo/x2go-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.x2go.org/pipermail/x2go-user/attachments/20210222/88edef63/attachment.htm>