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Bug 1966653

Summary:	sddm tells udev to execute "rm -f /etc/sddm/hide-wayland-sessions" on every udev event
Product:	[Fedora] Fedora	Reporter:	Zbigniew Jędrzejewski-Szmek <zbyszek>
Component:	sddm	Assignee:	Martin Bříza <m>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	jgrulich, kde-sig, me, m, pierluigi.fiorini, rdieter
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Zbigniew Jędrzejewski-Szmek 2021-06-01 15:30:01 UTC

Description of problem:
Holy moly, why involve udev in this at all? Please just check the kernel command
line when starting sddm. And if sddm cannot check itself, do it in ExecStartPre=.
There is really no need to touch the file system on every udev add, remove, change, bind, and unbind event.

Version-Release number of selected component (if applicable):
sddm-0.19.0-13.fc34.x86_64

Comment 1 Zbigniew Jędrzejewski-Szmek 2021-06-01 15:32:53 UTC

$ cat /usr/lib/udev/rules.d/61-sddm-plasmawayland.rules
# disable Wayland if modesetting is disabled
RUN+="/usr/bin/rm -f /etc/sddm/hide-wayland-sessions"
IMPORT{cmdline}="nomodeset", RUN+="/usr/bin/touch /etc/sddm/hide-wayland-sessions"