Re: DRM failure with ATI radeon 9200 and Kernel 2.6

From: Daniel Johnson (teknotus_at_gmail.com)
Date: 06/27/05

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    Date: Sun, 26 Jun 2005 23:05:53 -0700
To: debian-user@lists.debian.org

    >
    > Well, I suppose, but this is all automatic. To my knowledge, I haven't
    > specified it anywhere. One thing bothers me a little --- this is an AGP
    > card,
    > why is the bus id a PCI specification? Is that part normal?

    I think there might be an autoconfiguration script that creates the config
    file with the bus ID in it. My usual way to create a sample config is to run

    # X -configure
    Which is asking X itself to probe instead of doing something like use
    discover, or whatever other methods may be around. I think agp is more like
    PCI with a bunch of extensions to it than a completely different
    infrastructure, so showing up as a PCI bus slot isn't that weird. I think
    that you can tell it in the config to treat it like an AGP instead of as a
    PCI.

    > Did you check it against lspci?
    > I have done so now. ;-)
    > Here's the relevant lines:
    > """
    > 0000:01:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon
    > 9200] (rev 01)
    > 0000:01:00.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200]
    > (Secondary) (rev 01)
    > """
    >
    > I'm a little uncertain about how to read the bus ids here, but they look
    > plausible. Maybe
    > it should read PCI:1:0:1 or PCI:0:1:0? Even if I want to change this,
    > though, where do I
    > put the information? Is there a line in XF86Config-4 for this? I suppose I
    > can try to
    > set these with "dpkg-reconfigure xserver-xfree86" -- I'm pretty sure there
    > is an option to
    > specify the bus. But what should I tell it, if this isn't right?

    I have a multihead setup, and you can't avoid the bus ID's, and I have yet
    to see a multihead config program. You might not be able to avoid reading
    the docs. They are big, and complicated. Sometimes the setup debian gives
    you isn't enough.

    > Or maybe just the syntax of that line wrong?
    >
    > Um, which line? Again, I don't know where this would be specified. A
    > syntax error
    > sounds promising, but I don't know where to look for it. ISTM, whatever
    > syntax is
    > being used is being created by the driver software?
    >
    > I'm willing to go to a new driver or whatever if that's required, but this
    > looks like a
    > very minor problem --- it seems like there *ought* to be something I can
    > specify
    > somewhere to make this behave.

    Yeah look for the stuff about bus ID, and make sure it is loading the right
    driver.

    I'm also looking at the Gatos project and the Debugging DRI page:
    > http://gatos.sourceforge.net/dri-debug.php
    >
    > but it appears to me that this would involve compiling and installing new
    > drivers,
    > which means getting kernel-headers and so on. I'd like to avoid that if
    > there's a
    > simple configuration solution (which I'd likely have to solve anyway, even
    > for new
    > drivers).

    The Gatos project covers different stuff. That is more about accessing other
    features of ATI cards. You don't need it to display to a monitor, and
    technically if you don't care about acceleration you can use a generic VESA
    driver. 

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