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    SubjectRe: Radeon KMS doesn't work.
    Justin P. Mattock wrote:
    > On 07/05/2010 10:27 AM, Marvin wrote:
    > >
    > >Hi Wakko,
    > >
    > >as nobody seems to have answered yet, I think it's better that you file a
    > >bug
    > >against the radeon driver (bugs.freedesktop.org, one bug for each defect).
    > >There may be similar bugs already, so please check this also.
    > >
    > >Thanks
    > >
    > >Marvin
    > >
    > >Am Montag 05 Juli 2010, 01:19:26 schrieb Wakko Warner:
    > >>Wakko Warner wrote:
    > >>>I have a Dell Inspiron 5100 with an ATI Radeon Mobility M7 (7500 R100
    > >>>PCI ID 1002:4c57 sub 1028:0149).
    > >>>
    > >>>Immediately when radeon.ko is loaded, the screen goes blank (The
    > >>>backlight stays on). I have fbcon compiled into the kernel (I also
    > >>>tried as module). I am unable to get the screen to work again until I
    > >>>reboot. The logs did not appear to have any errors after the module
    > >>>loaded. The system was still responsive on the network.
    > >>>
    > >>>I tried kernels 2.6.33 and 2.6.34.
    > >>>
    > >>>I can provide kernel output if needed.
    > >>
    > >>I need to add that if I use modeset=0, the screen does not blank.
    > >>
    > >>Also 2.6.34 (with modeset=0) doesn't do 3D very well on this system. Some
    > >>objects look ok, some are garbled, some do not appear at all. The gears
    > >>from xscreensaver does not show up at all.
    > >
    > >--
    > >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    > >the body of a message to majordomo@vger.kernel.org
    > >More majordomo info at http://vger.kernel.org/majordomo-info.html
    > >Please read the FAQ at http://www.tux.org/lkml/
    > >
    >
    >
    > I've hit a couple of things with radeon as well.. the first was this:
    > http://lkml.org/lkml/2010/6/6/172
    > (if your hitting this issue, then the patch should work and/or it should
    > already be in the main tree).

    Doesn't appear to be. I mentioned above that I have no errors. I forgot
    about it saying something about the BIOS. It shows this
    [drm:radeon_get_bios] *ERROR* Unable to locate a BIOS ROM

    > then a few days ago hit another:
    > https://bugzilla.kernel.org/show_bug.cgi?id=16335
    > (keep in mind still uncertain on a fix for this, reverting the commit
    > gets me up and running(I created a patch, but an umsure if it's a right
    > solution)).

    This one appears to be X related. In my case, this happens immediately at
    radeon.ko load (with modeset=1).
    Verification of this was booting with init=/bin/sh and modprobe radeon.
    Instant black screen. The backlight stays on.

    > if none of these are what your hitting, then maybe(if you can) do a
    > bisect on this!

    I tried 2.6.32.15. I noticed that KMS was in staging. This one didn't do a
    black screen. I saw mostly white, green and a pinkish color. All were kind
    of washed out and were in vertical lines. KMS on this laptop has not worked
    with stock kernels.

    I booted Ubuntu 10.04 live CD and it appears that KMS was working. I don't
    know what patches they have in the kernel for this or what is different.

    --
    Microsoft has beaten Volkswagen's world record. Volkswagen only created 22
    million bugs.


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