Mario Ishac's questions

From Ubuntu package list for nvidia-driver-*, any nvidia driver in the major versions on the left will be effectively upgraded to the major version on the right:

495, 510      -> 510
460, 465, 470 -> 470
455           -> 460

This breaks compatibility if something relies on 495 but is not compatible with 510. An example is A100 GPUs on GCP, which can take 495 but not 510.

Why is it structured like this, instead of the major version appearing in the package name being kept as the latest possible major version? For example, why isn't nvidia-driver-495 restricted to only minor / patch releases on the 495 branch?

I have this file 1.txt:

-e a
b
-e c

d
-e e
f

I want to split it into the following two files.

2.txt

-e a
-e c
-e e

3.txt

b
d
f

where 2.txt contains all the lines starting with -e, and 3.txt contains all the other lines. Extra newlines (such as the extra newline in the middle of the original) can be ignored or kept, and order doesn't matter.

I've tried using split, but it doesn't look like that allows me to use a pattern for splitting (instead a fixed number of lines per split file).

I installed Ubuntu 20.04 Beta with the 3rd-party driver installation option checked. After the installation completed successfully and I had to restart, I used nomodeset in order to boot successfully. At this point in time, I had 5.4.0-25-generic as my kernel version, and the open source driver selected (as a result of nomodeset).

I then went into "Additional Drivers" to switch from the open source driver to Nvidia's proprietary 440 drivers. After the changed got applied, I was asked to restart. After restarting and booting back into Ubuntu, I see that the selected driver is the proprietary one I chose earlier, but my kernel is now 5.4.0-25-lowlatency. It somehow got added to the list of installed kernels at index 0 (value of GRUB_DEFAULT), even though I never installed it. When booting into specifically 5.4.0-25-generic through the GRUB menu, my GPU (an RTX 2060) isn't recognized (and, for example, the display ends up being low resolution). Only with this implcitily installed 5.4.0-25-lowlatency does my GPU get recognized.

Is this an expected compatibility issue between the generic kernel releases and Nvidia proprietary drivers? My intent here is to be able to install Nvidia's proprietary drivers along with the generic kernel, seeing that I don't do work which would benefit from the lowlatency one.

If it is a compatibility issue, why would the kernel being lowlatency suddenly resolve it, if it's still the same version (5.4.0-25)?