Re: : unclean backward scrolling

[Antonino A. Daplas]

Nick Warne wrote:
> Hmmmph.
> 
> I get this problem, and always have, but I always put it down to my system.
> 
> I run Slackware 10, and this has always happened to me from 2.6.2
> upwards on CRT 1024x768 and later TFT 1280x1024 dvi.
> 
> I use[d] in lilo:
> 
> # VESA framebuffer console @ 1280x1024x?k
> vga=794
> # VESA framebuffer console @ 1024x768x64k
> #vga=791
> 
> So you are not alone.
> 
> Nick
> 
> On 21/05/06, Antonio <tritemio@xxxxxxxxx> wrote:
>> Hi,
>>
>> I'm using the radeonfb driver with a radeon 7000 with the frambuffer
>> at 1280x1024 on a i386 system, with a 2.6.16.17 kernel. At boot time,
>> if I stop the messages with CTRL+s and try look the previous messages
>> with CTRL+PagUp (backward scrolling) the screen become unreadable. In
>> fact some lengthier lines are not erased scrolling backward and some
>> random characters a overwritten instead. So it's very difficult to
>> read the messages.
>>
>> I don't have such problem with the frambuffer at 1024x768.
>>
>> All the previous kernels I've tried have this problem (at least up to
>> 2.6.15).
>>
>> If someone can look at this issue I can provide further information.
>>
>> Many Thanks.
>>
>> Cheers,
>>

Can you try this patch and let me know if this fixes the problem?

Tony

PATCH: Fix scrollback with logo issue immediately after boot.

From: David Hollister <david.hollister@xxxxxxx>

After the system boots with the logo, if the first action is a
scrollback, the screen may become garbled.  This patch ensures
that the softback_curr value is updated along with softback_in
following the scrollback.

Signed-off-by: David Hollister <david.hollister@xxxxxxx>
Signed-off-by: Jordan Crouse <jordan.crouse@xxxxxxx>
---

 drivers/video/console/fbcon.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index ca02071..953eb8c 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -2631,7 +2631,7 @@ static int fbcon_scrolldelta(struct vc_d
 					scr_memcpyw((u16 *) q, (u16 *) p,
 						    vc->vc_size_row);
 				}
-				softback_in = p;
+				softback_in = softback_curr = p;
 				update_region(vc, vc->vc_origin,
 					      logo_lines * vc->vc_cols);
 			}

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