I made some progress on solving my graphics issues for #Electron apps on #Flatpak in #Debian 13 with #GNOME and #Wayland on my 2011 #iMac 27-inch:
- For Spotify, turning off GPU acceleration in Flatseal
- For Signal, copy the contents of the
.desktopfile into a new .desktop file in the local directory where those go, and modify theexecline to add--disable-gpu
Note: All of these problems also go away in an X11 session, but that breaks suspend/resume on this iMac, so I'm committed to staying in Wayland.
More details when I do a post on this.