Bug: Frame-buffer (icon) rotates right in 2.4.0 when SMP

Bug: Frame-buffer (icon) rotates right in 2.4.0 when SMP

[Karl O. Pinc]

Hi,

Apoligies in advance if this is not the right place to send this
report.

When displaying a screen-wide icon in the frame buffer for the
graphics console:

Linux version 2.4.0

Console Drivers
  Video mode selection support
    Support for frame buffer devices (EXPERMENTAL)
      VESA VGA graphics console

I found the right edge of the image to be displayed on the left edge
-- perhaps 8 pixels worth?

I compiled for a pentium III, SMP on.  I've a dual processor Pentium
III with a Matrox Graphics, Inc. MGA G400 AGP video card.  I
discovered this using the lpp-0.2.0 patch at http://lpp.freelords.org,
which displays a startup screen.

Fix:  turning SMP off fixed the problem.

FYI: fbcon_show_logo() in drivers/video/fbcon.c seems to have a for
loop with an odd smp_num_cpus reference.

Please contact me if you need any more information or wish to tell me
where to send this report.

Regards,

Karl <kop@meme.com>

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Re: Bug: Frame-buffer (icon) rotates right in 2.4.0 when SMP

[Mohammad A. Haque]

when you use SMP there's suppOsed to be one icon that shows up for
every CPU you have. 2 cpu = 2 icons, 4 cpu = 4 icon. That's what the for
loop in fbcon_show_logo().

So this really isnt a bug, depending on how you look at it. It's
definitely something the lpp author needs to account for.

On Sun, 7 Jan 2001, Karl O. Pinc wrote:

> When displaying a screen-wide icon in the frame buffer for the
> graphics console:
>
> Linux version 2.4.0
>
> Console Drivers
>   Video mode selection support
>     Support for frame buffer devices (EXPERMENTAL)
>       VESA VGA graphics console
>
> I found the right edge of the image to be displayed on the left edge
> -- perhaps 8 pixels worth?
>
> I compiled for a pentium III, SMP on.  I've a dual processor Pentium
> III with a Matrox Graphics, Inc. MGA G400 AGP video card.  I
> discovered this using the lpp-0.2.0 patch at http://lpp.freelords.org,
> which displays a startup screen.
>
> Fix:  turning SMP off fixed the problem.
>
> FYI: fbcon_show_logo() in drivers/video/fbcon.c seems to have a for
> loop with an odd smp_num_cpus reference.
>

-- 

=====================================================================
Mohammad A. Haque                              http://www.haque.net/
                                               mhaque@haque.net

  "Alcohol and calculus don't mix.             Project Lead
   Don't drink and derive." --Unknown          http://wm.themes.org/
                                               batmanppc@themes.org
=====================================================================

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Re: Bug: Frame-buffer (icon) rotates right in 2.4.0 when SMP

[Cajus Pollmeier]

Am Montag,  8. Januar 2001 04:00 schrieb Mohammad A. Haque:
> when you use SMP there's suppOsed to be one icon that shows up for
> every CPU you have. 2 cpu = 2 icons, 4 cpu = 4 icon. That's what the for
> loop in fbcon_show_logo().
>
> So this really isnt a bug, depending on how you look at it. It's
> definitely something the lpp author needs to account for.

It is already fixed in the new (not yet released) version.

-Cajus

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