Framebuffer display corruption on 2.6.12

Hi,

This looks like a userspace issue, but apparently it only appears after 
upgrading from 2.6.11 to 2.6.12...

Some Gentoo users have reported display corruption when using the framebuffer, 
easily visible in dialog-based applications. Sample screenshot:

https://bugs.gentoo.org/attachment.cgi?id=63264

Although the screenshot shows a framebuffer running on top of gentoo's 
"framebuffer splash", the same issue exists if you use plain old vesafb with 
no splash.

The issue has been reproduced in 2.6.13-rc5-mm1.

Any pointers in the right direction would be appreciated. Should I get this 
reported to the kernel bugzilla?

The original bug URL:

https://bugs.gentoo.org/show_bug.cgi?id=98804

Thanks,
Daniel


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On Fri, Aug 12, 2005 at 05:41:06PM +0100, Daniel Drake wrote:

Hi,

This looks like a userspace issue, but apparently it only appears after 
upgrading from 2.6.11 to 2.6.12...

Some Gentoo users have reported display corruption when using the 
framebuffer, easily visible in dialog-based applications. Sample screenshot:

https://bugs.gentoo.org/attachment.cgi?id=63264

I got similar looking corruption when I switched to unicode. Recompiling 
ncurses and slang with USE=unicode fixed it. alsamixer and menuconfig 
are still corrupted in the console but work fine under gnome-terminal 
whereas mc and ufed work in both environments. A case of linking with 
libncurses instead of libncursesw I guess...

-- 
Ville Syrjälä
syrjala@sci.fi
http://www.sci.fi/~syrjala/


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Daniel Drake wrote:

Hi,

This looks like a userspace issue, but apparently it only appears after 
upgrading from 2.6.11 to 2.6.12...

Some Gentoo users have reported display corruption when using the 
framebuffer, easily visible in dialog-based applications. Sample 
screenshot:

https://bugs.gentoo.org/attachment.cgi?id=63264

Although the screenshot shows a framebuffer running on top of gentoo's 
"framebuffer splash", the same issue exists if you use plain old vesafb 
with no splash.

The issue has been reproduced in 2.6.13-rc5-mm1.

I can't reproduce it here.  But can you try to reproduce it with vgacon
and with fbcon.

Any pointers in the right direction would be appreciated. Should I get 
this reported to the kernel bugzilla?

You may. (Do it under Drivers->Console/Framebuffers) Some prefer bugzilla,
some don't. I don't mind which.

Tony


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September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices
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Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf

Daniel Drake wrote:

Some Gentoo users have reported display corruption when using the 
framebuffer, easily visible in dialog-based applications. Sample 
screenshot:

https://bugs.gentoo.org/attachment.cgi?id=63264

This appears to be a userspace issue after all, relating to unicode settings. 
Sorry for the noise.

Daniel


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September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices
Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA
Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf