Bug#1081440: gnome-settings-daemon: test failure on arm64: Lid: timed out waiting for unblank

[Simon McVittie]

Source: gnome-settings-daemon
Version: 47~rc-1
Severity: serious
Tags: ftbfs experimental
Justification: fails to build from source (but built successfully in the past)

A retried build on arm64 has a test failure not seen on any other release
architectures:

https://buildd.debian.org/status/fetch.php?pkg=gnome-settings-daemon&arch=arm64&ver=47%7Erc-1&stamp=1726070527&raw=0

> ======================================================================
> FAIL: test_unblank_on_lid_open (__main__.PowerPluginTestLid.test_unblank_on_lid_open)
> Check that we do unblank on lid opening, if the machine will not suspend
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>   File "/<<PKGBUILDDIR>>/tests/output_checker.py", line 93, in check_line_re
>     l = self._lines.pop(0)
>         ^^^^^^^^^^^^^^^^^^
> IndexError: pop from empty list
> 
> During handling of the above exception, another exception occurred:
> 
> Traceback (most recent call last):
>   File "/<<PKGBUILDDIR>>/plugins/power/test.py", line 692, in test_unblank_on_lid_open
>     self.check_unblank(2)
>   File "/<<PKGBUILDDIR>>/plugins/power/test.py", line 384, in check_unblank
>     self.check_plugin_log('TESTSUITE: Unblanked screen', timeout,
>   File "/<<PKGBUILDDIR>>/plugins/power/test.py", line 349, in check_plugin_log
>     self.plugin_log.check_line(needle, timeout=timeout, failmsg=failmsg)
>   File "/<<PKGBUILDDIR>>/tests/output_checker.py", line 120, in check_line
>     return self.check_line_re(needle_re, timeout=timeout, failmsg=failmsg)
>            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>   File "/<<PKGBUILDDIR>>/tests/output_checker.py", line 105, in check_line_re
>     raise AssertionError(failmsg)
> AssertionError: timed out waiting for unblank

(Probably intermittent, and probably not actually architecture-specific.)

    smcv