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Ignore BadRROutput errors from XRRGetOutputInfo() 

Fixes https://github.com/libsdl-org/SDL/issues/12462
This commit is contained in:
Sam Lantinga 2025-03-04 16:05:38 -08:00
parent 80ae3a7516
commit 0c8ddc1f0a
1 changed files with 43 additions and 18 deletions
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61
src/video/x11/SDL_x11modes.c
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@ -223,6 +223,30 @@ SDL_PixelFormat X11_GetPixelFormatFromVisualInfo(Display *display, XVisualInfo *
}
#ifdef SDL_VIDEO_DRIVER_X11_XRANDR
// This catches an error from XRRSetScreenSize, as a workaround for now.
// !!! FIXME: remove this later when we have a better solution.
static int (*LastErrorHandler)(Display *, XErrorEvent *) = NULL;
static int SDL_XRRSetScreenSizeErrHandler(Display *d, XErrorEvent *e)
{
// BadMatch: https://github.com/libsdl-org/SDL/issues/4561
// BadValue: https://github.com/libsdl-org/SDL/issues/4840
if ((e->error_code == BadMatch) || (e->error_code == BadValue)) {
return 0;
}
return LastErrorHandler(d, e);
}
static int SDL_XRRGetOutputInfoErrHandler(Display *d, XErrorEvent *e)
{
// Ignore BadRROutput error, equivalent to RR_Disconnected
//
// We don't have the XRandR extension error base handy to check,
// so assume any errors are okay to ignore.
return 0;
}
static bool CheckXRandR(Display *display, int *major, int *minor)
{
// Default the extension not available
@ -386,6 +410,20 @@ static void SetXRandRDisplayName(Display *dpy, Atom EDID, char *name, const size
#endif
}
static XRROutputInfo *GetXRandROutputInfo(Display *dpy, XRRScreenResources *res, RROutput outputid)
{
XRROutputInfo *output_info;
// Make sure any previous errors are handled before we start
X11_XSync(dpy, False);
LastErrorHandler = X11_XSetErrorHandler(SDL_XRRGetOutputInfoErrHandler);
output_info = X11_XRRGetOutputInfo(dpy, res, outputid);
X11_XSetErrorHandler(LastErrorHandler);
return output_info;
}
static bool X11_FillXRandRDisplayInfo(SDL_VideoDevice *_this, Display *dpy, int screen, RROutput outputid, XRRScreenResources *res, SDL_VideoDisplay *display, char *display_name, size_t display_name_size)
{
Atom EDID = X11_XInternAtom(dpy, "EDID", False);
@ -429,7 +467,7 @@ static bool X11_FillXRandRDisplayInfo(SDL_VideoDevice *_this, Display *dpy, int
X11_XFree(pixmapformats);
}
output_info = X11_XRRGetOutputInfo(dpy, res, outputid);
output_info = GetXRandROutputInfo(dpy, res, outputid);
if (!output_info || !output_info->crtc || output_info->connection == RR_Disconnected) {
X11_XRRFreeOutputInfo(output_info);
return false; // ignore this one.
@ -859,7 +897,7 @@ bool X11_GetDisplayModes(SDL_VideoDevice *_this, SDL_VideoDisplay *sdl_display)
XRROutputInfo *output_info;
int i;
output_info = X11_XRRGetOutputInfo(display, res, data->xrandr_output);
output_info = GetXRandROutputInfo(display, res, data->xrandr_output);
if (output_info && output_info->connection != RR_Disconnected) {
for (i = 0; i < output_info->nmode; ++i) {
modedata = (SDL_DisplayModeData *)SDL_calloc(1, sizeof(SDL_DisplayModeData));
@ -883,19 +921,6 @@ bool X11_GetDisplayModes(SDL_VideoDevice *_this, SDL_VideoDisplay *sdl_display)
}
#ifdef SDL_VIDEO_DRIVER_X11_XRANDR
// This catches an error from XRRSetScreenSize, as a workaround for now.
// !!! FIXME: remove this later when we have a better solution.
static int (*PreXRRSetScreenSizeErrorHandler)(Display *, XErrorEvent *) = NULL;
static int SDL_XRRSetScreenSizeErrHandler(Display *d, XErrorEvent *e)
{
// BadMatch: https://github.com/libsdl-org/SDL/issues/4561
// BadValue: https://github.com/libsdl-org/SDL/issues/4840
if ((e->error_code == BadMatch) || (e->error_code == BadValue)) {
return 0;
}
return PreXRRSetScreenSizeErrorHandler(d, e);
}
#endif
bool X11_SetDisplayMode(SDL_VideoDevice *_this, SDL_VideoDisplay *sdl_display, SDL_DisplayMode *mode)
@ -929,7 +954,7 @@ bool X11_SetDisplayMode(SDL_VideoDevice *_this, SDL_VideoDisplay *sdl_display, S
return SDL_SetError("Couldn't get XRandR screen resources");
}
output_info = X11_XRRGetOutputInfo(display, res, data->xrandr_output);
output_info = GetXRandROutputInfo(display, res, data->xrandr_output);
if (!output_info || output_info->connection == RR_Disconnected) {
X11_XRRFreeScreenResources(res);
return SDL_SetError("Couldn't get XRandR output info");
@ -969,11 +994,11 @@ bool X11_SetDisplayMode(SDL_VideoDevice *_this, SDL_VideoDisplay *sdl_display, S
is likely to cause subtle issues but is better than outright
crashing */
X11_XSync(display, False);
PreXRRSetScreenSizeErrorHandler = X11_XSetErrorHandler(SDL_XRRSetScreenSizeErrHandler);
LastErrorHandler = X11_XSetErrorHandler(SDL_XRRSetScreenSizeErrHandler);
X11_XRRSetScreenSize(display, RootWindow(display, data->screen),
mode->w, mode->h, mm_width, mm_height);
X11_XSync(display, False);
X11_XSetErrorHandler(PreXRRSetScreenSizeErrorHandler);
X11_XSetErrorHandler(LastErrorHandler);
status = X11_XRRSetCrtcConfig(display, res, output_info->crtc, CurrentTime,
crtc->x, crtc->y, modedata->xrandr_mode, crtc->rotation,