[2.4.26 Patch] Blue line in nVidia framebuffer (rivafb)

[Byron Stanoszek]

This patch fixes a regression since Linux 2.4.21. There is an off-by-one error
with the vertical-blank register in the riva framebuffer driver. The error
makes a persistent scan line (normally blue) appear on the top of the screen.

Marcelo, please include this patch in the next -pre series.

Thanks,
 Byron


--- linux-2.4.26/drivers/video/riva/fbdev.bak	Wed Apr 14 11:45:26 2004
+++ linux-2.4.26/drivers/video/riva/fbdev.c	Wed Apr 14 14:15:22 2004
@@ -952,7 +952,7 @@
 	newmode.crtc[0x12] = Set8Bits (vDisplay);
 	newmode.crtc[0x13] = ((width / 8) * ((bpp + 1) / 8)) & 0xFF;
 	newmode.crtc[0x15] = Set8Bits (vBlankStart);
-	newmode.crtc[0x16] = Set8Bits (vBlankEnd);
+	newmode.crtc[0x16] = Set8Bits (vBlankEnd + 1);

 	newmode.ext.bpp = bpp;
 	newmode.ext.width = width;



--
Byron Stanoszek                         Ph: (330) 644-3059
Systems Programmer                      Fax: (330) 644-8110
Commercial Timesharing Inc.             Email: byron@xxxxxxxxxxx--- linux-2.4.26/drivers/video/riva/fbdev.bak	Wed Apr 14 11:45:26 2004
+++ linux-2.4.26/drivers/video/riva/fbdev.c	Wed Apr 14 14:15:22 2004
@@ -952,7 +952,7 @@
 	newmode.crtc[0x12] = Set8Bits (vDisplay);
 	newmode.crtc[0x13] = ((width / 8) * ((bpp + 1) / 8)) & 0xFF;
 	newmode.crtc[0x15] = Set8Bits (vBlankStart);
-	newmode.crtc[0x16] = Set8Bits (vBlankEnd);
+	newmode.crtc[0x16] = Set8Bits (vBlankEnd + 1);
 
 	newmode.ext.bpp = bpp;
 	newmode.ext.width = width;