Re: sis630 - help needed debugging in the kernel

From: James Simmons <jsimmons@transvirtual.com>
To: "René Rebe" <rene.rebe@gmx.net>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"Ademar de Souza Reis Jr." <ademar@conectiva.com.br>,
	Rolf Schillinger <rolf@sir-wum.de>,
	Linux Fbdev development list 
	<linux-fbdev-devel@lists.sourceforge.net>
Subject: Re: sis630 - help needed debugging in the kernel
Date: Wed, 13 Jun 2001 09:54:21 -0700 (PDT)	[thread overview]
Message-ID: <Pine.LNX.4.10.10106130952590.16375-100000@transvirtual.com> (raw)
In-Reply-To: <20010613172320.306d5208.rene.rebe@gmx.net>

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> I currently try to debug why the sisfb driver crashes my machine. (SIS 630
> based laptop - linux-2.4.5-ac13).

You can do one of two things. Post both System.map and the complete oops
or you can run ksymoops on the oops. I can find the problem then. Thanks.

> On my serial-console I get:
> [...]
> sisfb: framebuffer at 0xe0000000, mapped to 0xcb800000, size 16384k
> sisfb: MMIO at 0xefce0000, mapped to 0xcc801000, size 128k
> sisfb: encountered LCD # debug output by me
> sisfb: fall back to 1024x768 # debug ouput by me
> sisfb: LCD mode # debug output by me
> sisfb: mode is 800x600x8, linelength=800
> [...]
> Unable to handle kernel paging request at virtual address cc800180
> [oops]
> 
> This happens in the method: register_framebuffer called from sisfb_init.
> 
> I compared the sisfb_init with other framebuffer drivers and can't find what is wrong.
> (I normally don't do kernel hacking...). What does the kernel try to do with the
> _io-memory_, mapped around line 2230 in sis_main.c? - Must the memory reqeuested or
> mapped in an other way?
> 
> Another strange thing is, that the code seems to work for some people ...
> 
> I would be nice if anyone could give me a hint - because the sis-drivers (kernel and X)
> doesn't work for many people ...
> 
> k33p h4ck1n6 René
> 
> -- 
> René Rebe (Registered Linux user: #127875)
> http://www.rene.rebe.myokay.net/
> -Germany-
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