
Issue was caused by opening the same device id twice and closing one of descriptors on closing window. This used to close device used by other windows. Now moved all device-specific code to SystemX11, so opening and closing happens only once.
Issue was caused by opening the same device id twice and closing one of descriptors on closing window. This used to close device used by other windows. Now moved all device-specific code to SystemX11, so opening and closing happens only once.