[gentoo-user] kernel with DRM = blank screen

[gentoo-user] kernel with DRM = blank screen

[Helmut Jarausch]

Hi,

I have an old HP 625 laptop with an ATI RS880 HDMI Audio [Radeon HD  
4200 Series]
chip on board.

The xf86-video-ati driver needs DRM (direct rendering support) in the  
kernel.
Unfortunately, if (and only if) I enable DRM (built in or as module) in  
a recent kernel
like gentoo-sources-3.10.9, the kernel freezes with a blank screen  
during boot, i.e.
long before xorg-server is started (only by hand in my case).

So, what can I try to fix this (some IOAPIC switches on the boot  
command line)?

Many thanks for a hint,
Helmut

Re: [gentoo-user] kernel with DRM = blank screen

[Mick]

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On Thursday 29 Aug 2013 09:18:31 Helmut Jarausch wrote:
> Hi,
> 
> I have an old HP 625 laptop with an ATI RS880 HDMI Audio [Radeon HD
> 4200 Series]
> chip on board.
> 
> The xf86-video-ati driver needs DRM (direct rendering support) in the
> kernel.
> Unfortunately, if (and only if) I enable DRM (built in or as module) in
> a recent kernel
> like gentoo-sources-3.10.9, the kernel freezes with a blank screen
> during boot, i.e.
> long before xorg-server is started (only by hand in my case).
> 
> So, what can I try to fix this (some IOAPIC switches on the boot
> command line)?

Unless you want to venture into a trial and error kernel line fest, it may 
help if you post the point at which the kernel blanks out with any message 
just prior to the screen freezing.

-- 
Regards,
Mick

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