Recently in do the work of molecular docking, Linux system is needed in the simulation computation, so chose ubuntu18.04 system, because of not commonly used Linux and found a post installed try cuda10.2 https://blog.51cto.com/14204744/2464180 successfully without any problem at that time, the second day also is normal, and installed the VMD, but strange is the third day boot failure, continue to work when graphics driver test cuda also cannot run, my card is 2080 ti, I first try to drive the graphics card, using 440 before failure, all methods using apt installation has been show can't locate 440 folders,
I try to uninstall the cuda want to reinstall the lower version, I am not familiar with Linux, but past experience, so the new version compatibility may be less, but according to uninstall success, but again see cuda version, display or cuda10.2.
Finally, I try to according to the method of the prior to reinstall cuda10.2:


To disable the nouveau (sudo chmod 666/etc/modprobe. D/blacklist. Conf)
After
Vim/etc/modprobe. D/blacklist. Conf
# in the back to add the following code:
Blacklist nouveau
Blacklist LBM - nouveau
The options nouveau modeset=0
Alias nouveau off
Alias LBM - nouveau off
# and then save (esc key, then the shift key + : key, then enter wq, enter)
To ensure disabled completely off, and in the kernel directly to disable the Nouveau:
The command is:
Echo the options nouveau modeset=0 | sudo tee - a/etc/modprobe. D/nouveau - KMS. Conf
Change the permissions back out again, after the completion of the command is:
Sudo chmod 644/etc/modprobe. D/blacklist. Conf
After that, try updating configuration to take effect, the command is:
Update - initramfs -u
Resume: sudo reboot
Restart after haven't perform "sudo sh cuda_10. 2.89 _440. 33.01 _linux. Run" to start the installation, found that drive back, again test cuda10.2 also normal,,, although the problem is solved, but the reasons are unclear, consult everybody, where is my problem, my guess is, disable nouveau is not complete, has seen similar article mentioned before, to be completely disabled in the BIOS, but I'm not familiar with ubuntu, don't know whether I

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