On Mon, May 06, 2024 at 10:28:40AM +0100, Simon McVittie wrote: > Control: retitle 1057620 doomsday: segfault in _XFlush() when Qt is using > native Wayland > > On Mon, 06 May 2024 at 00:31:31 +0200, Bernhard Übelacker wrote: > > Bug 1062969 / Bug 1065714 mentions a workaround > > to be able to run doomsday with wayland: > > > > SDL_VIDEODRIVER=x11 QT_QPA_PLATFORM=xcb doomsday > > Bug 1062969 is about a problem with SDL_JoystickName(), which is > fixed in unstable. The clone #1065714 is also about doomsday's use > of SDL_JoystickName(). Fixing those is unrelated to that workaround: > the only connection is that I had to use that workaround to avoid the > crash-on-startup before I was able to reproduce the joystick bug on > my system. > > Bug 1057620 and its duplicate 1065709 are about the crash on startup that > can be worked around with "SDL_VIDEODRIVER=x11 QT_QPA_PLATFORM=xcb". > I'm copying the title from 1065709 to 1057620 to make its scope a bit > clearer. > > > It looks like upstream removed the relevant code and relies just > > on SDL functions, but unfortunately did not release a new version yet. > > > > https://github.com/skyjake/Doomsday-Engine/commit/5cc4995861 > > I haven't reviewed that change in detail, but letting SDL handle all of the > functionality within its scope is generally a good direction to go in. > > The root cause of this bug is that doomsday uses both SDL and Qt, each > of which makes its own independent choice between an X11 backend or a > native Wayland backend, and then uses X11 directly itself and assumes > that both SDL and Qt have also chosen to use X11. > > If Doomsday needs to use both SDL and Qt for graphics/windowing, probably > the right way to implement this would be to let one of those libraries > choose its backend (X11 or Wayland) according to its usual heuristic, > and then call configuration functions that force the other library to > make the same choice.
Is this the same bug as #1113738? If yes, does the workaround from Bernhard I NMUed there look correct to you? > smcv cu Adrian
