Re: Compiled tridentfb hangs but distribution kernel works fine

From: Mike Galbraith
Date: Wed Dec 10 2014 - 02:15:17 EST

On Tue, 2014-12-09 at 22:33 +0100, Ondrej Zary wrote:
> Hello,
> I'm doing some work on tridentfb driver but encountered a weird problem.
> When I compile custom kernel with tridentfb, it hangs with Blade3D card (ID
> 0x9880) in blade_image_blit(). The screen is blank with some artifacts and
> machine does not respond to ping or keyboard. However, it can be rebooted by
> Alt+SysRq+B. It works fine with other cards (3DImage 9750 and CyberBlade XP)
> with no blit implementation. Commenting out contents of blade_image_blit()
> function makes the hang go away (nothing useful on the screen, of course).
> The weird thing is that the Blade3D card works fine when I load Debian
> kernels! Debian 3.16-0.bpo.3-686-pae works fine but when I compile 3.16
> kernel, it hangs.
> Any ideas?

I'd start by looking for what Debian changed in source and/or config.


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