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Re: Network boot of RS/6000 CHRP systems

On Tue, Mar 14, 2006 at 06:53:21PM +0100, Alexander Baldeck wrote:
> Sven Luther wrote:
> >On Tue, Mar 14, 2006 at 09:30:29AM -0800, Jason Self wrote:
> >  
> >>Perhaps it's the monitor? Have you tried using it with another machine?
> >>
> >>On 3/14/06, Maes, Roel <it@edutoy.be> wrote:
> >>    
> >>>Dear sir,
> >>>
> >>>My company just bought a second hand IBM RS/6000 F50 server.
> >>>When i try to boot it, onfortunately, the screen remains blank.
> >>>I removed the VGA card, en installed an other one, but still, blank 
> >>>screen.
> >>>(no input signal detected)
> >>>      
> >
> >Please connect a serial cable, and try netbooting it through the serial
> >console (console=ttyS0,9600n8 usually), and post the result of the serial 
> >log
> >if it doesn't work for you.
> >
> >Friendly,
> >
> >Sven Luther
> If your card is not supported, you may want to try passing:
> video=ofonly

IBM rs6k chrp boxes boot into vga text mode, so this shoulde be no issue.

> in the append line to the kernel. It should then use the already 
> initialized screen from OpenFirmware.
> If your card has a DVI along with a regular DSUB15 VGA output, make sure 
> that the machine does not detect the wrong output. This happend to me 
> with a ATI Radeon 9200SE PCI MacEdition, my 43p Model 150 randomly chose 
> one on boot time but never probed both properly.

The card in question is probably either a matrox or sis or something such
graphic card, or a special IBM not supported by X nor fbdev one.

> Another card that works, is a Rage128 PCI usually found in older B&W G3 
> Powermacs.
> In any case, I second Sven's suggestion to use a serial console as it is 
> probably the most reliable solution.



Sven Luther

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