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Date: Fri, 16 Apr 2004 09:40:38 -0700
From: "Randy.Dunlap" <rddunlap@osdl.org>
To: Timothy Miller <miller@techsource.com>
Cc: benh@kernel.crashing.org, felix-kernel@fefe.de,
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Subject: Re: radeonfb broken
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On Fri, 16 Apr 2004 12:06:22 -0400 Timothy Miller wrote:

| 
| BTW, now that we're on the topic of Radeon, could someone tell me how to 
| tell the kernel the default resolution to use when initializing the 
| console?
| 
| When using a CRT, it defaults to 640x480.  When I use my Planar PQ191 
| 19" 1280x1024 monitor, it defaults to 1024x768.  I want it to default to 
| 1280x1024.  There's a tool, fbset or something like that, which I can 
| use AFTER bootup, but trying to put that into init causes all sorts of 
| conflicts.  I need to be able to tell the kernel, either at compile time 
| or on the boot command line.

See <Documentation/fb/modedb.txt> for a little help: <quote>

Valid mode specifiers (mode_option argument):

    <xres>x<yres>[-<bpp>][@<refresh>]
    <name>[-<bpp>][@<refresh>]

with <xres>, <yres>, <bpp> and <refresh> decimal numbers and <name> a string.
Things between square brackets are optional.
</quote>


I haven't done this, but I've seen emails using syntax like so:

(from /etc/lilo.conf:)

append="video=radeonfb:1024x768-32@100"

or:
append="video=radeonfb radeonfb.mode_option=1280x1024-32@60"

or:
append="video=radeonfb:1024x768-32@100"


Looking at the driver source code, I'd guess that the middle
one above is closest to correct.

ISTM that Documentation/kernel-parameters.txt needs a paragraph
about syntax for specifying parameters for built-in modules vs.
loadable modules....


| Moving off topic, my cries for help from the XFree86 people also seem to 
| have gotten lost in the flow of hundreds of usenet messages.  Try as I 
| might, I cannot seem to get XFree86 to talk to my monitor at anything 
| other than 60Hz.  Even though LCD monitors have a persistent image, 
| increasing the frame rate CAN reduce motion blur slightly.


--
~Randy
"We have met the enemy and he is us."  -- Pogo (by Walt Kelly)
(Again.  Sometimes I think ln -s /usr/src/linux/.config .signature)