deb packages missing dependency on python3-gi-cairo

[totaam]

Issue migrated from trac ticket # 2862

component: packaging | priority: minor | resolution: fixed | keywords: ubuntu, kubuntu, kde, deb

2020-08-14 22:37:15: grady created the issue

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Installing xpra from the xpra.org deb repositories does not install python3-gi-cairo as a dependency.
Invoking xpra from the command line results in a completely black xpra window and an error on console

xpra start --start=xterm
xpra attach

TypeError: Couldn't find foreign struct converter for 'cairo.Context'

installing python3-gi-cairo resolves the error and xpra subsequently displays the window properly

sudo apt install python3-gi-cairo

python3-gi-cairo may be present on other flavors of Ubuntu due to a dependency from some other package. Apparently, Kubuntu minimal install has no packages that depend on python3-gi-cairo.

The Ubuntu distribution package for xpra has python3-gi-cairo as a dependency.

OS: Kubuntu 20.04 (focal) minimal install
Desktop Environment: KDE Plasma 5

[totaam]

2020-08-15 06:13:10: antoine changed status from new to closed

[totaam]

2020-08-15 06:13:10: antoine set resolution to fixed

[totaam]

2020-08-15 06:13:10: antoine commented

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I'll take your work for it, fixed in r27157.
I've never seen this problem myself, we already depend on python3-cairo, and we never import Cairo from the gi bindings. (maybe something in Gtk does - do you have the full backtrace?)