Beware that seabios 0.6.2 is broken for QXL. You need to apply this

patch

diff --git a/src/config.h b/src/config.h

index e6e07c9..cd71c3a 100644

--- a/src/config.h

+++ b/src/config.h

@@ -51,7 +51,7 @@

 #define BUILD_PCIPREFMEM_END      0

 #else

 #define BUILD_PCIMEM_START        0xf0000000

-#define BUILD_PCIMEM_SIZE         0x08000000    /* half- of pci window */

+#define BUILD_PCIMEM_SIZE         0x09000000    /* half- of pci window */

 #define BUILD_PCIMEM_END          (BUILD_PCIMEM_START + BUILD_PCIMEM_SIZE)

 #define BUILD_PCIPREFMEM_START    BUILD_PCIMEM_END

 #define BUILD_PCIPREFMEM_SIZE     (BUILD_PCIPREFMEM_END - BUILD_PCIPREFMEM_START)