Computer Systemen 2024: Labbook

May 17, 2024

My XPS workstation has problems again.
Recovery mode still works
Seems that a install was halfway killed. Had to do a pkg recovery.
Nvidia keyring was old, so updated with the method indicated in this post
Could update many programs. The boot goes further, but has a flashing mounting disk.
Back to recovery mode, several installs are held back, including cuda and cuda-drivers. Instaling them manually, which results that many cuda-12-4 packages are installed.
Removed some old cuda-packages, including cuda-9.2

Rebooted nb-ros, still no wired connection can be found. Last Thursday I tried the connection with nb-dual, which worked.
The wired connection shows on its leds traffic, so it seems no hardware problem.
Found this post, which suggested to do sudo lshw -C network, which only gave one logical name (wlan0)
The old GUI nm-applet no longer worked, but nm-connection-editor gave the possibility to edit the connection. Seemed that the connection was only half saved, so included a netmask (255.255.255.0) and a Gateway. Device is still not visible with nmcli device.
The command nmcli con shows that the connection is known, but not coupled to a device.
There seems to be two problems. One is that with Ubuntu 18.04, they switched from one controller to another (netplan and NetworkManager).
Looked at this suggestion, and modified /usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf to add a suggestion for type type:ethernet. Restarting the NetworkManager didn't not resolve it.
Looked in the /etc/NetWorkManager/system-connections, but both 'Wired connections' were the same, except the settings which I just edited with nm-connection-editor
Looked in /etc/network and added an eth0 entry in the file /etc/network/interfaces. As a result, the connection shows up (from type ethernet), but also not connected to a device.
Strange enough, no leds led up when I use the other Dell adapter.

Had the problem that when connected to the camera, I couldn't connect to internet (wired had preverence on wireless connection)
This advice, but when I select Use this connection only for resources on its network I cannot apply it (I am in manual mode).
Next followed the advice of this post, although I had to use the connection, not the device name.
Looked up the connection name with nmcli device, followed by nmcli connection modify 'Wired connection 2' ipv4.never-default true.
Solution seems to work, otherwise I couldn't edit this line.
Should not forget to turn off again when no longer needed.
Strange, when disconnecting the ethernet cable and reconnecting, I get lights on my LAN, but no wired configuration anymore in my Network configuration.
Could try to add a keyfile, as suggested in this post.

WSL Ubuntu 22.04 was frozen again, so looked at some tricks from this discussion. The combination of stopping the wsl-service, restarting the LxssManager service and doing wsl --shutdown solved this issue without a reboot (my solution of last week).

Received a request for an Ubuntu 22.04 machine. From my last check, four machines are an option.
ws9 looks the best option, checking who is using it now. Thomas has used it still last Monday.