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Fedora 20: Strange behaving gdm initial login screen only after boot

asked 2014-04-15 10:15:37 -0500

nippur gravatar image

updated 2014-09-29 16:25:01 -0500

mether gravatar image

Hi all,

Rather peculiar problem here: after booting my login screen is behaving very strangely (flickering, distortions). I can login (clicking 'somewhere at the righ place'), and my session screen is very clear.

When I logout to gdm login screen, it is as it should be: very clear.

So only the first time after (re)boot it's a mess.

Fedora 20 fresh install GNOME Version 3.10.2 Gallium 0.4 on ATI RS690

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answered 2014-04-15 11:58:40 -0500

nippur gravatar image

updated 2014-04-21 04:13:50 -0500

Appeared that the absence of a /etc/X11/xorg.conf file caused this behavior.

Created one (as root in terminal) with X :1 -configure ; ignored the error messages and copied the resulting xorg.conf.new as xorg.conf to /etc/X11/

Login screen after (re)boot is fine now


edit:

I noticed that the llvmpipe driver is used now, which makes the compu very slow. When the radeon driver is loaded, the problem still exists.

The card is a ATI Radeon X1270.

I can't understand why the initial boot login screen is flickering and the returning login screen after session logout isn't. The latter only begins to flicker when Ii close the lid (suspend?) and open it again.

have to live with it, i guess...


edit edit:

switching to lightdm ( # yum install lightdm lightdm-gtk; systemctl disable gdm.service; systemctl enable lightdm.service ) did the trick. Beautiful clear after-boot-login-screen. After login to Gnome, no screen issues.

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since this is not an answere to the problem, but more of a work around, i won' t close the question

nippur gravatar imagenippur ( 2014-04-21 04:10:43 -0500 )edit

Has anyone found a solution to this? I am also having this problem.

kvandergriff gravatar imagekvandergriff ( 2014-06-22 17:04:07 -0500 )edit

Had the same troubles, installing and enabling lightdm has worked for me on a Dell Inspiron 1521 with radeon xpress 1270. I don't know what the problem is with gdm, but this has woked. I found another message with the same issue at http://www.linuxformat.com/forums/vie...

sktr gravatar imagesktr ( 2014-09-01 07:26:27 -0500 )edit

Also, this bug report has more info on the problem: https://bugzilla.redhat.com/show_bug.cgi?id=981096

sktr gravatar imagesktr ( 2014-09-01 08:05:44 -0500 )edit

re: "( # yum install lightdm lightdm-gtk; systemctl disable gdm.service; systemctl enable lightdm.service )"

fixed my problem beautifully but only AFTER rebooting my pc, which was not obvious to me.

I previously had the garbled login for every login screen not just after boot.

langolier42 gravatar imagelangolier42 ( 2017-05-17 18:33:56 -0500 )edit
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answered 2015-01-14 02:56:29 -0500

rich1974 gravatar image

i have the same problem and switching to lightdm solved the issue, the problem started back in 2012 when the 3.5 kernel appeared. same hardware, dell inspiron 1521, ati radeon x1270. i think it is a gdm problem with this pretty old hardware. the only problem with lightdm is that the "turn off display" does not work, at least in my case. i had to use dome "xset" settings to turn it off at a given time.

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in this moment, it seems that the gdm was somehow fixed, it is working fine right now. [rich1974@localhost ~]$ rpm -q gdm gdm-3.14.1-2.fc21.i686 [rich1974@localhost ~]$ uname -r 3.17.8-300.fc21.i686 [rich1974@localhost ~]$

rich1974 gravatar imagerich1974 ( 2015-01-25 02:45:27 -0500 )edit
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answered 2017-02-08 10:56:11 -0500

nippur gravatar image

in this moment, it seems that the gdm was somehow fixed, it is working fine right now. [rich1974@localhost ~]$ rpm -q gdm gdm-3.14.1-2.fc21.i686 [rich1974@localhost ~]$ uname -r 3.17.8-300.fc21.i686 [rich1974@localhost ~]$ rich1974 (Jan 25 '15)

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Asked: 2014-04-15 10:15:37 -0500

Seen: 3,598 times

Last updated: Jan 14 '15