Messages in this thread Patch in this message | | | Date | Thu, 12 Jan 2006 18:37:44 -0800 | From | Chris Wright <> | Subject | [PATCH 06/17] [PATCH] vgacon: fix doublescan mode |
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-stable review patch. If anyone has any objections, please let us know. ------------------
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> ---
drivers/video/console/vgacon.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
--- linux-2.6.15.y.orig/drivers/video/console/vgacon.c +++ linux-2.6.15.y/drivers/video/console/vgacon.c @@ -503,10 +503,16 @@ static int vgacon_doresize(struct vc_dat { 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); -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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