Summarize the problem
On my Ubuntu 20.04 installation I have no network connection and am only able to output to a single monitor. The problems started after I rebooted my machine. It might be related to doing an sudo apt upgrade and or installation/uninstallation of the Citrix Receiver and Citrix Workspace app.
Provide details and any research
The problem in detail
- There are no connections shown in the gnome applet
- If I connect a USB wifi stick it does not show up either
- The device does show in
lsusb
- Only a single monitor is available from both gnome settings as well as
xrandr
Like mentioned in the summary this all might be related to doing an apt upgrade and or and or installation/uninstallation of the Citrix Receiver and Citrix Workspace app.
Doing the upgrade
While doing the apt upgrade I got the The following packages have been kept back:. I did not try to solve this issue. I can't easy copy all packages (no network). But they where all related to nvidia-driver-450 I think.
Installing Citrix software
I needed the Citrix software for some work related things. I first (by mistake) installed the probably depricated Citrix receiver. I used this command: sudo dpkg -i icaclientWeb_13.10.0.20_amd64.deb. When I released I actually needed the newer Citrix Workspace app I purged the web client and installed the Workspace app by: sudo dpkg -i icaclient_21.6.0.28_amd64.deb.
I'm not sure if this all is related, but it might be I guess.
What I’ve tried
- I inspected various network configuration files and compared them to a working Ubuntu 20.04 installation on my laptop.
- I ran
dpkg-reconfigure on a couple packages; network-manager, network-manager-gnome, nvidia-driver-450
- Rebooted multiple times
- Tested using a live Ubuntu 20.04 USB, everything works as expected; network, monitors etc.
- installed and uninstalled the Citrix packages
- Used dpkg-deb to view the files and double checked that everything was removed after uninstall
- Ran various tools (see below for output)
A couple things I noted:
- My ethernet adapter is not visiable in
ip addr
There are however two br-xxxxxxxxx interfaces. I'm not totally sure how I got those? Same holds for nmcli dev and networkctl.
sudo lshw -C network show *-network UNCLAIMED
Perhaps any of you guys can help me out or give me some advice on how to troubleshoot this further. Its a real pain that I have no network, but if it helps I can copy full text output of some command or files and transfer them by a usb thumbdrive to my laptop and add them here.
Update 1
I found out why I have those two extra br-xxxxx (bridge interfaces) they where related to docker. Using docker network rm to remove them and now they are gone. Probably was unrelated to my issues.
I used grub to boot the previous kernel version 5.8.0.59.66~20.04.42 this brought everything back to normal, networking works monitors work. The kernel that probably introduced my issues was 5.11.0-22.23~20.04.1. Going to have a look if I can get my system running with the latest kernel again. But already really happy I have come this far, I was almost just going to reinstall the whole thing.
