This is a more correct fix to CDROM/DVDROM events/auto-mounting than was made
in the now-reverted commit 670724edcf ("gnu: eudev: Fix optical discs
detection/auto-mounting.")
This changes causes the 60-block.rules udev rules file shipped with eudev to
correctly set the default polling period to 2000 ms on block devices, which is
necessary for kernel events to be fired for CDROM drives for example. To
validate it is set:
# cat /sys/module/block/parameters/events_dfl_poll_msecs
2000
Before, it would return 0.
* gnu/services/base.scm (udev-shepherd-service): <#:start>: Add a 'udevadm
trigger --change=add --type=subsystems' invocation, so that it also creates
subsystem nodes, as done in Void Linux or LinuxFromScratch init scripts for
example.
* gnu/tests/base.scm (run-basic-test): Add test.
Fixes: <https://issues.guix.gnu.org/35584>
Change-Id: Idc0eb5640163b27e41b72cc0c1885412a60805c1
3bb6147fdc