software-properties-qt: nvidia driver version switch fails

kubuntu-driver-manager now just launches software-properties-qt, so changing package to software-properties where the code for that is.

Could you please test with software-properties-gtk? (you might need to install the package)
Then we could know if it is a software-properties-qt or a software-properties-* problem.
Thanks!

software-properties-gtk works as expected.

If you install the package aptdaemon, does that help?

Status changed to 'Confirmed' because the bug affects multiple users.

aptdaemon has been installed from the start.

$ grep -ir get_dependencies *
softwareproperties/gtk/SoftwarePropertiesGtk.py:def get_dependencies(apt_cache, package_name, pattern=None):
softwareproperties/gtk/SoftwarePropertiesGtk.py: for dep in get_dependencies(self.apt_cache, pkg.shortname, 'nvidia'):
softwareproperties/qt/SoftwarePropertiesQt.py: for dep in get_dependencies(self.apt_cache, pkg.shortname, 'nvidia'):

So looks like the porting of the driver page to software-properties-qt was incomplete compared to the -gtk one?

could you test adding this to /lib/python3/dist-packages/softwareproperties/qt/SoftwarePropertiesQt.py SoftwarePropertiesQt.py ? For me testing with nvidia is not easy

--- /lib/python3/dist-packages/softwareproperties/qt/SoftwarePropertiesQt.py 2020-04-14 09:16:19.370592334 -0400
+++ SoftwarePropertiesQt.py 2020-04-14 09:02:21.894527421 -0400
@@ -78,6 +78,17 @@
       QWidget.__init__(self)
       uic.loadUi("%s/designer/main.ui" % datadir, self)

+def get_dependencies(apt_cache, package_name, pattern=None):
+ """ Get the package dependencies, which can be filtered out by a pattern """
+ dependencies = []
+ for or_group in apt_cache[package_name].candidate.dependencies:
+ for dep in or_group:
+ if dep.rawtype in ["Depends", "PreDepends"]:
+ dependencies.append(dep.name)
+ if pattern:
+ dependencies = [ x for x in dependencies if x.find(pattern) != -1 ]
+ return dependencies
+
 class SoftwarePropertiesQt(SoftwareProperties):
   def __init__(self, datadir=None, options=None, parent=None, file=None, attachWinID=None):
     """ Provide a Qt-based graphical user interface to configure

The patch in comment #9 solves the issue for me.

A fix for this has been uploaded. It is currently stuck in proposed pocket due to an unrelated test failure of a reverse dependency, but I anticipate that being sorted before 20.04 release.

This bug was fixed in the package software-properties - 0.98.9

---------------
software-properties (0.98.9) focal; urgency=medium

  * softwareproperties/gtk/SoftwarePropertiesGtk.py:
    - Gtk is doing something that takes a lock while processing checkbox
      toggled events, the polkit auth dialog can't be displayed in return,
      we don't have a proper fix and it might require GTK changes,
      meanwhile we want a working interface so workaround with a sleep
      (lp: #1727908)

 -- Sebastien Bacher <email address hidden> Thu, 16 Apr 2020 11:57:50 +0200