Changeset 2942 in vbox for trunk/src/VBox/Devices/Graphics

Timestamp:

May 30, 2007 5:26:40 PM (18 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

21624

Message:

Fixed video mode switch from fullscreen DOS to XP guest desktop.

File:

• trunk/src/VBox/Devices/Graphics/DevVGA.cpp (modified) (1 diff)

trunk/src/VBox/Devices/Graphics/DevVGA.cpp

@@ -764 +764 @@
                 s->gr[0x05] = (s->gr[0x05] & ~0x60) | (shift_control << 5);
                 s->cr[0x09] &= ~0x9f; /* no double scan */
+#ifdef VBOX
+                /* sunlover 30.05.2007
+                 * The ar_index remains with bit 0x20 cleared after a switch from fullscreen
+                 * DOS mode on Windows XP guest. That leads to GMODE_BLANK in vga_update_display.
+                 * But the VBE mode is graphics, so not a blank anymore.
+                 */
+                s->ar_index |= 0x20;
+#endif /* VBOX */
             } else {
                 /* XXX: the bios should do that */