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Subject[PATCH] Fix vesafb display panning regression
Fix vesafb hang when scroll mode is REDRAW.

Signed-off-by: Antonino Daplas <>

Jesper Juhl wrote:
> On 12/11/05, Andrew Morton <> wrote:
> When booting this kernel with vga=791 like I normally do, the kernel
> hangs on boot. Booting with vga=normal works just fine.
> I don't have very much info since as soon as the videomode is switched
> I get a small rectangle of messed up colours in the top left corner of
> the screen (the rest is just black) and then it hangs - even the
> keyboard is dead, I have to powercycle the machine.
> Nothing makes it to the logs and I don't have a second machine atm to
> get logs via serial console or netconsole.
> I've got the vesafb driver build in, none of the other fb drivers.

Sorry about that. This particular hunk was missing in the


drivers/video/vesafb.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c
index e6e56b8..8982e54 100644
--- a/drivers/video/vesafb.c
+++ b/drivers/video/vesafb.c
@@ -417,6 +417,9 @@ static int __init vesafb_probe(struct pl
info->flags = FBINFO_FLAG_DEFAULT |

+ if (!ypan)
+ info->fbops->fb_pan_display = NULL;
if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
err = -ENOMEM;
goto err;
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