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This is a temporary workaround for kernel panic occurring when

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switching video modes.  People typically see the panic when the screen
saver has been running and is being stopped.

WARNING: this is not a real fix.  Something really funny must be
happening in the page table entries for the physical memory
0x0-0xa0000, which is mapped to the beginning of the kernel region.
This commit is contained in:
Kazutaka YOKOTA 1999-03-15 00:20:56 +00:00
parent ee28fadec0
commit 170f96bb1a
1 changed files with 3 additions and 1 deletions
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4
sys/i386/isa/vga_isa.c
View file

@ -26,7 +26,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: vga_isa.c,v 1.2 1999/01/23 10:55:16 yokota Exp $
* $Id: vga_isa.c,v 1.4 1999/02/05 12:58:40 yokota Exp $
*/
#include "vga.h"
@ -1973,6 +1973,7 @@ vga_load_state(video_adapter_t *adp, void *p)
inb(crtc_addr + 6); /* reset flip-flop */
outb(ATC, 0x20); /* enable palette */
#if notyet /* a temporary workaround for kernel panic, XXX */
#ifndef VGA_NO_BIOS
if (adp->va_unit == V_ADP_PRIMARY) {
writeb(BIOS_PADDRTOVADDR(0x44a), buf[0]); /* COLS */
@ -1984,6 +1985,7 @@ vga_load_state(video_adapter_t *adp, void *p)
#endif
}
#endif /* VGA_NO_BIOS */
#endif /* notyet */
splx(s);
return 0;