qemu: add option to disable X grabs

When the mouse pointer enters the qemu window it takes a pointer grab. This
doesn't sound too dangerous at first but it turns out that SDL will infinitely
busy-loop if it can't get the grab (e.g. if the screen is locked) and the
average autobuilder setup's X server will have locked the screen a few minutes
after boot.

The result is that on many autobuilders apparently random qemu instances (the
top-most one under the pointer) will hang during boot.

To resolve this add an option (via an environment variable) to never attempt a
grab.  The default behaviour remains to grab so that everyone else doesn't see
any change.

(From OE-Core rev: a60b1ebbb8f81245f3ccf25b3f9d63677de75b85)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index 97e9b7be1c..1b861d7dc9 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -17,6 +17,7 @@ SRC_URI = "\
     file://powerpc_rom.bin \
     file://no-strip.patch \
     file://larger_default_ram_size.patch \
+    file://disable-grabs.patch \
     "
 
 SRC_URI_append_class-nativesdk = "\