Public bug reported:
My preseed file, if it includes `ubiquity/hide_slideshow true` option,
causes the installer to crash.
With Ubuntu 14.04, I've used this param successfully for preseeded
installs. With 20.04 (and also 18.04; so maybe 16.04 as well) preseed
installs, I've had to leave this parameter out of my preseed files.
Here's the traceback off my USB installer, afterwards, from writable
/install-logs-DATE/log/installer (Also attached are the full set of
logs):
```
Exception in GTK frontend (invoking crash handler):
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/gi/overrides/GLib.py", line 664, in
<lambda>
func_fdtransform = lambda _, cond, *data: callback(channel, cond, *data)
File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1618, in
watch_debconf_fd_helper
return callback(source, debconf_condition)
File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 267, in
process_input
self.frontend.debconffilter_done(self)
File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1668, in
debconffilter_done
self.find_next_step(dbfilter.__module__)
File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1772, in
find_next_step
self.maybe_start_installing()
File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1716, in
maybe_start_installing
self.parallel_db = DebconfCommunicator('ubiquity',
File "/usr/lib/ubiquity/ubiquity/debconfcommunicator.py", line 35, in __init__
debconf.Debconf.__init__(self, title=title,
File "/usr/lib/python3/dist-packages/debconf.py", line 71, in __init__
self.setUp(title)
File "/usr/lib/python3/dist-packages/debconf.py", line 74, in setUp
self.version = self.version(2)
File "/usr/lib/python3/dist-packages/debconf.py", line 83, in <lambda>
lambda *args, **kw: self.command(command, *args, **kw))
File "/usr/lib/python3/dist-packages/debconf.py", line 104, in command
status = int(status)
ValueError: invalid literal for int() with base 10: ''
```
A few other references I've seen to this parameter:
- Initial feature request/release circa Ubuntu 10.10 that included it:
https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/690912
- A report for a separate issue in Xubuntu 18.04, with a warning message about
the parameter: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1800199
** Affects: ubiquity (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Log files from the installer up to the crash"
https://bugs.launchpad.net/bugs/1888451/+attachment/5394763/+files/install_error_ubiquity-hide_slideshow.tar.gz
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https://bugs.launchpad.net/bugs/1888451
Title:
regression: ubiquity/hide_slideshow true; crashes installer
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