gdm no longer starts at boot (systemd)

monsm · Guru Joined: 26 Sep 2007 Posts: 467 Location: London, UK

Hi,
I found this old post as I have the same problem.

My system is:
Gdm 3.14.1-r1
Ati-drivers-14.12-r1 (hardware: Radeon HD 6550D)
xorg-server-1.15.2

I had Gdm 3.12 with the same problem and tried to upgrade to 3.14, but no change. I also updated to the above latest Ati drivers with no change.

I switched to Slim which works fine, so it doesn't matter too much, but anyone know why this problem persist and what the prospect is for a fix?

regards,
Mons

Aphax · Tux's lil' helper Joined: 16 Jan 2006 Posts: 75

See if there are any broken symlinks to libglx.so under /usr/lib32/xorg/modules/extensions. I don't know exactly what I did wrong on my own systems, but on 3 seperate machines, a recent world update broke GDM on all of them, because Xorg failed to load libglx, which GDM apparently needs. Simply removing the dead symlinks fixed the issue for me

heheman3000 · n00b Joined: 22 Oct 2006 Posts: 33

monsm · Guru Joined: 26 Sep 2007 Posts: 467 Location: London, UK

same result as heheman with me too.

I even tried to delete /usr/lib64/xorg/modules/extensions/libglx.so (which was not broken), but the system froze before slim login came up, so didn't bother to try to switch to gdm again.
As I have a 64 bit system I guess it was always a long shot that a 32 bit broken link should have this effect.

mons

heheman3000 · n00b Joined: 22 Oct 2006 Posts: 33

As I was browsing the forum trying to solve another issue, I came across this post: https://forums.gentoo.org/viewtopic-t-1007790-highlight-atidrivers.html

Basically, you'll probably only see the abovementioned problem if there is a ModulePath in your xorg.conf that points at /usr/lib32/xorg/modules...

Still haven't fixed this issue yet. Does no one else have it? LightDM doesn't lock my desktop, so it really introduces some big problems in the office.

heheman3000 · n00b Joined: 22 Oct 2006 Posts: 33

Based on earlier posts, I tried downgrading to xorg-server-1.14.7 (hard unmask) and ati-drivers 13.12; still segfaulting.

Is anyone able to get GDM to work? An earlier user mentioned using 3.10, but that is no longer in the tree. I'd really like to try and have a working lock screen.

heheman3000 · n00b Joined: 22 Oct 2006 Posts: 33

Seems like someone has tracked down the culprit here: https://oliverchang.github.io/2014/12/22/fixing-linux-amd-catalyst-linux-drivers-gdm/

The arch linux folks have managed to accomplish this binary library rewriting with https://aur.archlinux.org/packages/catalyst-fix-gdm/ . Is it possible to do the same thing in Gentoo?

heheman3000 · n00b Joined: 22 Oct 2006 Posts: 33

ati-drivers 15.1 is now available as a hack of 14.12, which by some reports might fix this using xorg-server 1.17.1. Haven't tried it out myself yet, though.

See the diff in this line, specifically 'gdm_hack':

http://www.calculate-linux.org/packages/x11-drivers/ati-drivers/diff/154000/148372

See also https://bugs.gentoo.org/show_bug.cgi?id=516816

EDIT: gdm doesn't crash, but just shows a black screen (not able to login or anything) with ati-drivers 15.1 using gdm-hack.

eccerr0r · Posted: Sun May 10, 2015 10:50 pm Post subject:

Gnome 3.14 imploded on me with the newest setup (egl and gles2). Gdm was the only borked component before, now the whole world came crashing down.

Oh well, I'm using xfce4 for now...
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