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Framebuffer display corruption on 2.6.12

DISCUSSION Daniel Drake 3 participants 4 messages Aug 12, 2005 – Aug 15, 2005 Framebuffer layer

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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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#1 lore raw
Quoted 9 lines · Daniel Drake

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...

Signature · 10 lines
Ville Syrjälä
[email protected]
http://www.sci.fi/~syrjala/


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#2 lore raw
In reply to Daniel Drake
Quoted 11 lines · Daniel Drake

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.

Quoted 3 lines

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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#3 lore raw
In reply to Daniel Drake
Quoted 3 lines · Daniel Drake

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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SF.Net email is Sponsored by the Better Software Conference & EXPO 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