Context: https://askubuntu.com/questions/1371055/ubuntu-21-10-resume-produces-blank-screen How to debug: https://wiki.ubuntu.com/DebuggingKernelSuspend Did this and found the following in dmesg output:
[ 1.322162] PM: Magic number: 0:486:890
[ 1.322167] PM: hash matches drivers/base/power/main.c:905
[ 1.322237] pci 0000:00:1f.3: hash matches
lspci contained:
This is an OpenPGP proof that connects my OpenPGP key to this Github account. For details check out https://keyoxide.org/guides/openpgp-proofs
[Verifying my OpenPGP key: openpgp4fpr:FINGERPRINT]
Here's a list of topics I think would benefit some CompSci or Software Engineering undergraduate degrees. Which of these are already covered really well by some universities? Comments welcome here or on this Mastodon thread.
(The following overlooks my early use of Red Hat Linux, on a Thinkpad, around the turn of the century and my repeated use of Ubuntu in VMs since then.)
The NVIDIA GK106GL [Quadro K4000] graphics card seems to cause crashes on various distros. Here's the checkered history of my desktop machine:
| Glyn Normington | |
| Prove pythagoras's theorem. | |
| Pythagoras's theorem states that in a right triangle (a triangle with one 90 degree angle), the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides. This can be written as: | |
| a^2 + b^2 = c^2 | |
| where a and b are the lengths of the other two sides of the triangle, and c is the length of the hypotenuse. | |
| Here is a proof of this theorem using Euclidean geometry: |
This gist captures debugging information about a crash that has been happening relatively recently on my arch system.
See my distro-hopping history for more context.
The symptoms are that X crashes on resume. If I issue startx again, then there seem to be issues using the USB mouse, so I suspect some USB mouse problem is responsible for the crash.