Can't login to fedora 25 gnome, except by using startx from tty

Question

Last week fedora 25 gnome software center installed a buggy gdm version on my system, I removed it but still having problems. I'm using Gdm and Wayland session.

I can't login to fedora from login page, the only way is to use tty, login, then startx

I tried many solutions, including removing Xauthority, chmod temp -R 755 or something and many other solutions but nothing worked.

What bother me the most is that I faced this same issue many years back on ubuntu and solved it but can't remember what I did! Hell I might have even solved it on Crunchbang many years ago!

the log file of startx

xauth:  file /home/user/.serverauth.1830 does not exist
X.Org X Server 1.19.1
Release Date: 2017-01-11
X Protocol Version 11, Revision 0
Build Operating System:  4.10.0-0.rc4.git0.2.fc26.x86_64 
Current Operating System: Linux fedora 4.9.13-201.fc25.x86_64 #1 SMP Tue Mar 7 23:47:11 UTC 2017 x86_64
Kernel command line: BOOT_IMAGE=/vmlinuz-4.9.13-201.fc25.x86_64 root=/dev/mapper/fedora-root ro rd.lvm.lv=fedora/root rd.lvm.lv=fedora/swap rhgb quiet LANG=en_US.UTF-8
Build Date: 01 February 2017  02:03:54AM
Build ID: xorg-x11-server 1.19.1-3.fc25 
Current version of pixman: 0.34.0
    Before reporting problems, check http://wiki.x.org
    to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
    (++) from command line, (!!) notice, (II) informational,
    (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/home/user/.local/share/xorg/Xorg.1.log", Time: Sun Mar 12 14:37:10 2017
(==) Using config directory: "/etc/X11/xorg.conf.d"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)
(II) [KMS] Kernel modesetting enabled.
pkexec version 0.113

If it can't be solved, I'll switch to lightdm or kdm

Answer 1

type=AVC msg=audit(1489481742.902:140): avc: denied { view } for pid=1159 comm="gdm-session-wor" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:kernel_t:s0 tclass=key permissive=0

The AVC you posted points to this bug #1378297 already filled in the Red Hat bugzilla.

To make sure it is really the same problem, I would give it a try SELinux in permissive (running seteonfoce 0 will not be effective over reboots). Modify /etc/selinux/config and change enforcing to permissive and then try to reboot.

The other possibility is to follow the steps in the report:

# ausearch -c 'gdm-session-wor' --raw | audit2allow -M my-gdmsessionwor
# semodule -X 300 -i my-gdmsessionwor.pp

and reboot. If it will help, nagging in the bugzilla to fix that is probably a way to go :)

Answer 2

I tried a billion solution, nothing worked, today I upgraded to Fedora 26, everything worked just fine, error fixed. No idea how, must be some buggy software that got fixed by the upgrade.