Mint 19 crashes with NVIDIA drivers 390 or 340 and GeForce GT630

How did you install the driver?
Please run nvidia-bug-report.sh as root and attach the resulting .gz file to your post. Hovering the mouse over an existing post will reveal a paperclip icon.

I installed the driver regularly using the MINT 19 Driver function, prompting for reboot after complete install. After Reboot the screen hangs with a blinking cursor, I cannot start the terminal with CRTL+ALT+F1.
Where can I find “nvidia-bug-report.sh”?

nvidia-bug-report.sh get installed along with the driver.
If you can’t switch to VT, try to ssh in from another system. Install openssh-server to be able to do so.

Managed to create the bug report, pls find attached
nvidia-bug-report.log.gz (73.3 KB)

Doesn’t look good

[    5.181720] NVRM: failed to copy vbios to system memory.
[    5.181881] NVRM: RmInitAdapter failed! (0x30:0xffff:663)
[    5.181906] NVRM: rm_init_adapter failed for device bearing minor number 0

Can have various causes. Defective hardware, kernel incompatibility, pcie slot problems.
Try reseating the card, change slot if possible, upgrade/downgrade kernel, check if card works in a different system.

Might also be a corrupt vbios. To check for that, switch to nouveau and add the following to kernel commandline

nouveau.debug=debug,VBIOS=trace

Reboot, run dmesg > dmesg.txt and attach.

Where exactly and how do I add “nouveau.debug=debug,VBIOS=trace”?

https://askubuntu.com/questions/19486/how-do-i-add-a-kernel-boot-parameter

Here it is …
dmesg.txt (62.6 KB)

That didn’t work, the command line is still:

Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-24-generic root=UUID=cd47eae9-6000-4c4d-ab12-8369c2175651 ro quiet splash vt.handoff=1

If you changed it in grub config, did you forget to run sudo update-grub afterwards?
you can check the current cmdline with
cat /proc/cmdline

Sorry, here it ist
dmesg.txt (250 KB)

Unfortunately, this time the xorg nouveau usage overflooded the dmesg. Please disable the xserver using
sudo systemctl disable display-manager
and reboot, then run dmesg > dmesg.txt again and attach.
Afterwards, you can reenable and start xorg using
sudo systemctl enable display-manager
sudo systemctl start display-manager

Unfortunately enabling doesn’t work … =8-o
It says failed to enable unit: unit file display-manager does not exist.

Here it is
dmesg.txt (144 KB)

use
sudo systemctl enable lightdm
or
sudo dpkg-reconfigure lightdm
to get the login back.

Thanx - went the timeshift way … ;-) But now I know for next time … :-)

Nouveau reports a checksum failure

[    1.130414] nouveau 0000:01:00.0: bios: 00000000: type 00, 62464 bytes
[    1.168264] nouveau 0000:01:00.0: bios: 00000000: checksum failed

The proprietary driver doesn’t accept that, so fails. It’s a very rare condition, you can either try to use nvflash to reflash a sane image or, if reflashing doesn’t work, use the method from this thread:
https://devtalk.nvidia.com/default/topic/1020418/linux/lenovo-y550-gt-m240-vs-ubuntu-17-07-16-04-14-04/post/5196169/#5196169
Or simply replace the card.

OK, thats bad news. How do I use nvflash?

And where do I get a sane image …?

e.g.
https://www.techpowerup.com/vgabios/158993/158993
Edit: there are also bios sanitizers so you can reflash your own bios.