Signed-off-by: Michael Tokarev <m...@tls.msk.ru>
---
ui/sdl.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/ui/sdl.c b/ui/sdl.c
index dc5c3a1..14a62d9 100644
--- a/ui/sdl.c
+++ b/ui/sdl.c
@@ -831,6 +831,18 @@ void sdl_display_init(DisplayState *ds, int full_screen,
int no_frame)
if (!full_screen) {
setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 0);
}
+#ifdef __linux__
+ /* on Linux, SDL may use fbcon|directfb|svgalib when run without
+ * accessible $DISPLAY to open X11 window. This is often the case
+ * when qemu is run using sudo. But in this case, and when actually
+ * run in X11 environment, SDL fights with X11 for the video card,
+ * making current display unavailable, often until reboot.
+ * So make x11 the default SDL video driver if this variable is unset.
+ * This is a bit hackish but saves us from bigger problem.
+ * Maybe it's a good idea to fix this in SDL instead.
+ */
+ setenv("SDL_VIDEODRIVER", "x11", 0);
+#endif
/* Enable normal up/down events for Caps-Lock and Num-Lock keys.
* This requires SDL >= 1.2.14. */
--
1.7.2.5
