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[PATCH] vgacon: fix doublescan mode 

When doublescan mode is in use, scanlines must be doubled.

Thanks to Jason Dravet <dravet@hotmail.com> for reporting and testing.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Samuel Thibault 2006-01-08 01:02:34 -08:00 committed by Linus Torvalds
parent b8b0af2435
commit 954de9141e
1 changed files with 7 additions and 1 deletions
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8
drivers/video/console/vgacon.c
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@ -503,10 +503,16 @@ static int vgacon_doresize(struct vc_data *c,
{
unsigned long flags;
unsigned int scanlines = height * c->vc_font.height;
u8 scanlines_lo, r7, vsync_end, mode;
u8 scanlines_lo, r7, vsync_end, mode, max_scan;
spin_lock_irqsave(&vga_lock, flags);
outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg);
max_scan = inb_p(vga_video_port_val);
if (max_scan & 0x80)
scanlines <<= 1;
outb_p(VGA_CRTC_MODE, vga_video_port_reg);
mode = inb_p(vga_video_port_val);