[Linux-fbdev-devel] Re: [Xpert]ATI Rage Mobility external monitor problem.

[Marc A. La F. <ts...@ua...>]

On Fri, 12 Oct 2001, Stelian Pop wrote:

> I have a Vaio Picturebook C1VE running Linux, and I have a
> problem when using an external monitor with the CVS version
> of XFree86.

> I'm running the 2.4.10-ac12 version of the Linux kernel
> (which contains Marcel's patch for wide framebuffer console:
> CONFIG_FB_ATY_CT_VAIO_LCD).

> The ATI card is:
> 	00:0d.0 VGA compatible controller: ATI Technologies Inc Rage Mobility P/M (rev 64)

> When the framebuffer code is compiled into the kernel, external
> monitor picture is blurred. Since is rather hard to explain,
> here is a picture of the monitor taken with an digital camera:
> 	http://spop.free.fr/xfree/xfree-monitor.jpg

> If the framebuffer code is _not_ compiled into the kernel,
> external monitor works fine (note that this was not the case with
> XFree 4.1.0, only the CVS version contains the fixes to make it
> happen).

> I've also noted that even without launching X, when using the
> framebuffer, the external display picture is blurred too. However,
> in text mode this is hardly noticable.

It sounds to me that atyfb isn't dealing with shadow registers properly.

> It is clear that the framebuffer code has a bug which causes the
> blur. But it isn't clear for me why XFree is not able to
> reinitialize the hardware correctly after the framebuffer code has
> touched it.

If it did, it would not be able to restore the mode on entry properly.

Marc.

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