Reproducer:

1. Install openSUSE 15.2
2. Install sway
3. Pick sway as session type from gdm login (gear icon)

Result:

GDM returns to login. journal shows:

Apr 27 18:26:13 workhorse /usr/lib/gdm/gdm-wayland-session[14076]: 2020-04-27
18:26:13 - [backend/session/direct-ipc.c:35] Do not have CAP_SYS_ADMIN; cannot
become DRM master
Apr 27 18:26:13 workhorse /usr/lib/gdm/gdm-wayland-session[14076]: 2020-04-27
18:26:13 - [backend/session/session.c:96] Failed to load session backend
Apr 27 18:26:13 workhorse /usr/lib/gdm/gdm-wayland-session[14076]: 2020-04-27
18:26:13 - [backend/backend.c:286] Failed to start a DRM session
Apr 27 18:26:13 workhorse /usr/lib/gdm/gdm-wayland-session[14076]: 2020-04-27
18:26:13 - [sway/server.c:47] Unable to create backend

Expected: wayland session starting

Bug ID	1170619
Summary	GDM fails to start wayland session for sway (CAP_SYS_ADMIN missing)
Classification	openSUSE
Product	openSUSE Distribution
Version	Leap 15.2
Hardware	Other
OS	Other
Status	NEW
Severity	Normal
Priority	P5 - None
Component	GNOME
Assignee	os.gnome.maintainers@gmail.com
Reporter	daniel.molkentin@suse.com
QA Contact	qa-bugs@suse.de
Found By	---
Blocker	---