Arch Linux

HangerGuardian

Member

Registered: 2020-03-02

Posts: 4

Xorg Broke After Update

Hello.
A few days ago after running pacman -Syu and shutting down, I was met with a black screen and a blinking underscore instead of the normal gdm login screen on the next boot. I used single to login as root and disable gdm so I could work from the command line. I tried a few different display managers, SDDM got the same result as gdm, and LXDM looked like it was going to work, but after clicking my username and entering my password it just took me back to the user selection screen.

I eventually went to the gdm config and forced it to use xorg instead of wayland and then I was able to get to the gdm login screen. However, my password got delete as a typed it, and was also displayed instead of hidden by * like usual. If I typed really fast I could type my password before getting booted back to the user selection but it didn't do anything. There was also a constant message saying "Sorry that didn't work. Please try again." underneath the password bar.

Next, I tried starting gnome-xorg using startx. It failed to start. Here is the xorg log file https://pastebin.com/MqfASZpR.

Any advice is appreciated,
Thanks!

loqs

Member

Registered: 2014-03-06

Posts: 19,087

Re: Xorg Broke After Update

There is no apparent issue with X from the log.  From the description the issue is with the display managers and user authentication and possibly another issue with Wayland.
What was in the update ( /var/log/pacman.log )?  What is the journal contents for the last boot?

cj360

Member

Registered: 2013-10-12

Posts: 67

Re: Xorg Broke After Update

[  1966.179] (EE) Failed to load module "nouveau" (module does not exist, 0)

Are you meaning to use the nouveau driver or proprietary nvidia? As it looks like Xorg closes after trying and failing to load nouveau.

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 78,001

Re: Xorg Broke After Update

The problem is

[  1966.181] (EE) open /dev/dri/card0: No such file or directory
[  1966.181] (WW) Falling back to old probe method for modesetting
[  1966.181] (EE) open /dev/dri/card0: No such file or directory
[  1966.181] (EE) Screen 0 deleted because of no matching config section.
[  1966.181] (II) UnloadModule: "modesetting"
…
[  1966.982] (II) IGLX: Loaded and initialized swrast
[  1966.982] (II) GLX: Initialized DRISWRAST GL provider for screen 0

As a result you end up w/ the VESA driver (which usually should not even be installed and) which does not provide the necessary features (esp. missing any HW acceleration) to power the more fancy desktop environments or just DMs.
cj360's question is relevant, though because a postential cause is the installation of the nvidia kernel module w/o the X11 driver or explicitly loading the nvidia-drm module.

=>

lsmod | grep -E '(nvidia|nouveau)'
pacman -Qs nvidia

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