Re: New API and X option UseFBDev

On Tue, Sep 09, 2003 at 02:57:58PM +0100, Jim Hague wrote:

On 09-Sep-2003 Sven Luther wrote:

quoted

On Tue, Sep 09, 2003 at 07:49:55AM +0100, Jim Hague wrote:

quoted

I have a problem when I try and run X (Debian 4.2.1-11 20030829103906). My
config uses the Glint driver with UseFBDev true, and works fine on 2.4.22.
[....]
It's occurred to me that maybe this just doesn't work and I need an updated
fbdevhw. Do I? Or should it really Just Work?

I think the glint driver is hardcoded to expect amiga hardware when
using pm2 with fbdev. Just don't use the usefbdev option, and everything
should be fine.

the glint driver does not really support usefbdev anyway, only as a
hacky workaround for amigas with cybervision/bvision graphic board.

Unfortunately, I do rather think I need to use UseFBDev. Hardware is

Ok, i was wrong, it has been some time since i looked at the glint
driver for fbdev stuff, altough i am kind of the default maintainer of
the glint driver now, or at least part-wise with Alan Hourihane. After
looking at it, i saw that the fbdev code is hardcoded to use a ti_pm2,
and will not work with other graphic chips. But the pm3 X driver i wrote
worked perfectly well without it.

Graphics Exxtreme, x86, BTW. Without, things just don't work properly -
something isn't quite right with the mode set by X, and you can't switch back
to the console. Well, you can try, but it seems to hang the kernel.

I'm currently using UseFBDev on 2.4, for the same reasons. I will keep on
digging.

Mmm, notice that the :

(--) GLINT(0): Linear framebuffer at 0xCE800000
(--) GLINT(0): MMIO registers at 0xCFFE0000
(EE) GLINT(0): mmap mmio: Invalid argument
(EE) GLINT(0): mmap mmio: Invalid argument

means that the linear framebuffer and mmio registers, values given to
you by pm2fb, are correct (but check this fact with lspci). GLINTMapMem
should call fbdevHWMapVidmem, so i suppose the message you see are from
fbdevhw. Try enabling the DEBUG #define in glint_driver.c to get a bit
more context. 

Friendly,

Sven Luther


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