dzang's questions

I installed QGIS using conda. If I start qgis from the terminal it works well as it has everything it needs to use in the PATH as defined by the conda base environment.

However I cannot pin that app to the dash, so I created an xdg-open shortcut:

#!/usr/bin/env xdg-open
[Desktop Entry]
Version=1.0
Type=Application
Terminal=false
Exec=/home/dzang/miniconda3/bin/qgis
Name=QGIS
Comment="QGIS 3.18"
Icon=/home/dzanaga/Pictures/Qgis-icon-3.0.png

When I use this Application shortcut, QGIS starts but then it doesn't work well since I guess it tries to use the system python/gdal. Basically some functionality is disabled and error messages pop up at the beginning.

So the question is, how to I configure the shortcut such that it starts QGIS as if it was started from within the miniconda base environment. e.g. How do I have it running in a session where the PATH starts with /home/dzang/miniconda3/bin:/home/dzang/miniconda3/condabin

I am trying to get my Macbook Pro 13,3 (touchbar late 2016) to work with my Nvidia eGPU under Ubuntu 19.10.

I installed the Nvidia drivers, and used https://github.com/hertg/egpu-switcher to create the xorg.conf file.

When I reboot, (using rEFInd) I get to the ubuntu login screen, but when I try to login, the login fails and is stuck in a loop because the Nvidia drivers do not load. e.g. if I login with Wayland, I manage to get in and I can see that nvidia-smi doesn't work, prompting "Cannot connect to the Nvidia driver..."

After some troubleshooting I found out that by disconnecting the bus where the thunderbolt 3 eGPU is connected and then rescanning, the driver loads and the GPU works.

So as a workaround what I do is: At the login screen I get to the terminal login pressing Ctrl-Alt-Fn-F2 and then:

sudo -s # to escalate to root

as root I run:

echo 1 > /sys/bus/pci/devices/0000:00:01.1/remove
echo 1 > /sys/bus/pci/devices/0000:00:01.2/remove  # this disable the tb3 peripherical where the egpu is connected (upper right port of the macbook)

echo 1 > /sys/bus/pci/rescan

exit

startx

And this finally starts Gnome using the eGPU to render on the external monitor as desired.

So my question would be: is there a way to automate this process, such that when I login normally this trick is automatically performed during the login process?