Flatseal will not open on my chromebook

[Rand0mUserThatExists]

For some reason, once I installed Flatseal and tried to run it in the Linux terminal, it would not open. Is there a way to fix this?

[rusty-snake]

Try to start it from a terminal (flatpak run com.github.tchx84.Flatseal) to see error messages.

[elSoduz]

flatpak run com.github.tchx84.Flatseal

(com.github.tchx84.Flatseal:2): Gtk-WARNING **: 04:31:53.832: Theme parser error: gtk.css:3783:126-133: Expected a number

(com.github.tchx84.Flatseal:2): Gdk-WARNING **: 04:31:54.324: vkGetPhysicalDeviceSurfaceFormatsKHR(): A surface is no longer available. (VK_ERROR_SURFACE_LOST_KHR) (-1000000000)

(com.github.tchx84.Flatseal:2): Gdk-WARNING **: 04:31:54.325: vkGetPhysicalDeviceSurfaceFormatsKHR(): A surface is no longer available. (VK_ERROR_SURFACE_LOST_KHR) (-1000000000)

(com.github.tchx84.Flatseal:2): Gdk-WARNING **: 04:31:54.344: vkGetPhysicalDeviceSurfaceCapabilitiesKHR(): A surface is no longer available. (VK_ERROR_SURFACE_LOST_KHR) (-1000000000)

(com.github.tchx84.Flatseal:2): Gtk-WARNING **: 04:31:54.439: No IM module matching GTK_IM_MODULE=cros found

[tchx84]

hmm, looks like something in GTK (not Flatseal specific)... Some of those warnings are vulkan-related, try running the app with GSK_RENDERER=gl flatpak run com.github.tchx84.Flatseal to force the old renderer?

[thystra]

I have a similar problem, unable to launch on Ubuntu 24.10. When I run it from the command line, I get the following errors:

$ flatpak run com.github.tchx84.Flatseal
MESA-INTEL: warning: ../src/intel/vulkan/anv_formats.c:782: FINISHME: support YUV colorspace with DRM format modifiers
MESA-INTEL: warning: ../src/intel/vulkan/anv_formats.c:814: FINISHME: support more multi-planar formats with DRM modifiers
Gdk-Message: 17:41:13.437: Error 71 (Protocol error) dispatching to Wayland display.

Using your GSK_RENDERER mod above, it works.