Blank render area without GPU acceleration

[okennedy]

After recently installing Marker on a new computer (via flatpak), the render area did not display properly (PopOS 21.10, with onboard Intel graphics). The entire area where the markdown render was supposed to be displayed was just blank grey. The same occurred in multi-window mode. Running marker on the command line produced the following output:

okennedy@athena:~$ flatpak run com.github.fabiocolacio.marker
Gtk-Message: 15:16:15.178: Failed to load module "appmenu-gtk-module"
Gtk-Message: 15:16:15.214: Failed to load module "canberra-gtk-module"
Gtk-Message: 15:16:15.215: Failed to load module "canberra-gtk-module"
Gtk-Message: 15:16:15.453: Failed to load module "appmenu-gtk-module"
Gtk-Message: 15:16:15.511: Failed to load module "canberra-gtk-module"
Gtk-Message: 15:16:15.516: Failed to load module "canberra-gtk-module"
scroll 2.0 extension initialized
libGL error: MESA-LOADER: failed to retrieve device information
intel_do_flush_locked failed: Input/output error
intel_do_flush_locked failed: Input/output error

Based on the libGL error, I tried enabling GPU permissions (device=dri) in flatseal. This appeared to resolve the problem. The same issue does not arise on computers with an identical OS, but discrete graphics.

[violetmage]

greetings

this appears to be an issue with the flatpak package, and not marker itself, therefore @fabiocolacio requesting this issue be moved or closed

however, the people maintaining the flatpak package have taken note, and already fixed this issue:
flathub/com.github.fabiocolacio.marker@edc8de4

nonetheless, thank you for your well written post