Score:0

Ubuntu

Infinite login loop (having tried dozens of solutions)

Tom

5/27/23, 2:57 PM

Running Ubuntu 20.04; 2x Geforce GTX 1080 Ti installed. This is the second time I ever encounter the infinite login loop problem; can't remember how I solved it last time, as it was years ago. I installed TensorFlow (pip install tensorflow), then following a power outage I couldn't login. I'm guessing the tensorflow installation messed up my nvidia drivers (last version installed: libnvidia-cfg1-460) or something else. What I've tried so far from tty3: $ sudo nano /etc/default/grub change line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset" or GRUB_CMDLINE_LINUX_DEFAULT="quiet" or GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off" or GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pnpacpi=off"

Followed by sudo update-grub

Obviously none of these worked. Then, I've tried purging all CUDA and Nvidia drivers, and attempted to reinstall Nvidia: sudo apt-get remove --purge '^nvidia-.*' sudo apt-get --purge remove cuda* sudo apt --fix-broken install

Then tried to reinstall from here: https://developer.nvidia.com/cuda-downloads?target_os=Linux&target_arch=x86_64&Distribution=Ubuntu&target_version=20.04&target_type=deb_local but got: failed: Network is unreachable (though ping to google works fine)

Of course, still doesn't work. Then, I tried in tty3: chown username:username .Xauthority but no such file or directory!! Uninstalled lightdm, then installed gdm3: sudo apt-get install gdm3 sudo dpkg-reconfigure gdm3 still, no luck. Tried again to find .Xauthority from: https://docs.citrix.com/en-us/linux-virtual-delivery-agent/7-15-ltsr/configuration/configure-xauthority.html ps aux | grep -i xorg got the output: 1323 0.1 0.1 279612 67544 tty1 Sl+ 08:32 0:00 /usr/lib/xorg/Xorg vt1 -displayfd -auth /run/user/121/gdm3/Xauthority
(*unforutnately, my screen doesn't show all the output when I'm in tty3, so I'm not absolutely sure about the part between gdm3/ and hority, where the line breaks and I miss several letters on the screen) so, I try to access /run/user/121/gdm3/ to get .Xauthority: cd /run/user :No such file or directory

Try step by step: cd /run

That works. Now:

Edited steps inserted here:

cd user sudo su was needed to enter 121: cd 121 dir

tells me there's only Xauthority, not .Xauthority. So I tried: chown user:user Xauthority

Still not working. This looks to me like a lost cause, but of course, all and any input would be greatly appreciated.

0 + 0

nvidia

Terrance

5/27/23, 3:40 PM

Is `cd /user` a typo? If you are already in `/run` the next part would just be `cd user` without the `/` as that would mean that the `user` folder would be right off the root `/` and not in `/run`.

Tom

5/27/23, 4:06 PM

Good catch! I managed to enter /run/user, but am then unable to access 121: cd: 121: permission denied so I tried sudo cd 121 cd: command not found

mook765

5/27/23, 4:15 PM

`cd` is a shell-builtin and not a command, `sudo` only works with commands. Do `sudo su` and then `cd 121`.

Tom

5/27/23, 4:39 PM

Thank you, was now able to enter folder and run chown user:user Xauthority (not .Xauthority, which doesn't exist). Will report whether this works.

ubfan1

5/27/23, 4:54 PM

Try a search of this site for login loop. The .Xauithority with the wrong permissions is usually in your home directory. I don't know what you are trying to do with the gdm's copy of Xauthority either. You should have your own copy under /run/user/1000... Did you try moving all the "dot" files (like .local, .cache, .config, ...) into a directory for temporary storage? If that fixes the login, move them back out one at a time to identify the one that's bad (or just leave them if everything run OK, they'll regenerate).

Tom

5/27/23, 5:06 PM

I don't have any other Xauthority files on my computer, as seen from the ps aux | grep -i xorg (if I understand it correctly), and definitely not under /run/user/1000

Organic Marble

5/27/23, 5:16 PM

After you did the edits to `/etc/default/grub` did you run `sudo update-grub`?

Tom

5/27/23, 5:20 PM

Organic Marble: Yes, I forgot to mention and will now edit to add that. ubfan1: I have no files beginning with a dot under /run/user/1000. All that's there is dbus-1 dconf gnupg gvfs inaccessible pk-debconf-socket pulse snapd-session-agent.socket systemd

Tom

5/28/23, 8:15 AM

I'm giving up. What's the common practice in this community? Should I delete the question, or leave it for posterity to witness?

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Infinite login loop (having tried dozens of solutions)

TH: การเข้าสู่ระบบวนซ้ำไม่สิ้นสุด (หลังจากลองวิธีแก้ปัญหามากมาย)

RO: Buclă de conectare infinită (încercând zeci de soluții)

RU: Бесконечный цикл входа в систему (перепробовав десятки решений)

VI: Vòng đăng nhập vô hạn (đã thử hàng chục giải pháp)

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