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[PATCH] vgacon: fix doublescan mode

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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: Chris Wright <chrisw@sous-sol.org>
This commit is contained in:
Samuel Thibault
2006-01-14 22:15:28 -08:00
committed by Chris Wright
parent a2a1d0e361
commit 2d7fc97cea
1 changed files with 7 additions and 1 deletions
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drivers/video/console/vgacon.c
+7 -1
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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);