[Bug 23752] New: drm/radeon/kms -- hang during boot unless using "nomodeset"

[Bug 23752] New: drm/radeon/kms -- hang during boot unless using "nomodeset"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=23752

           Summary: drm/radeon/kms -- hang during boot unless using
                    "nomodeset"
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.37-rc3
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: linville@tuxdriver.com
                CC: rjw@sisk.pl
        Regression: Yes


Created an attachment (id=38212)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=38212)
lspci-info.txt

Boot hangs very early unless nomodeset is used.  No disk access is observed and
box never becomes available on the network.

The box is an HP 8530p laptop.  Normal functionality is restored by reverting
this patch:

commit bdd91b2b571c80dacfca88667d935f9907e62931
Author: Tyson Whitehead <twhitehead@gmail.com>
Date:   Mon Nov 8 16:08:30 2010 +0000

    drm/radeon/kms: fix bugs in ddc and cd path router code

    This is a follow on to:
    2b5b1d7da9583484b3a9e7e375a90ca0e8ca07c2
    (drm/radeon/kms: add support for clock/data path routers)

    That patch completed mux support for ddc and cd line routing
    between connectors.  This patch fixes an indexing typo that was
    resulting in the atom bios router objects not always being walked,
    ensures the validity entries for the reused router structure are
    reset for every connector object walked, and corrects the masking
    operations used to update the mux control bits.

    Fixes:
    https://bugs.freedesktop.org/show_bug.cgi?id=31339

    Signed-off-by: Tyson Whitehead <twhitehead@gmail.com>
    Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
    Signed-off-by: Dave Airlie <airlied@redhat.com>

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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=23752


John W. Linville <linville@tuxdriver.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=31339




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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=23752


Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com




--- Comment #1 from Alex Deucher <alexdeucher@gmail.com>  2010-11-25 16:16:36 ---
Can you attach a copy of the video bios from that laptop?  See this link for
how to dump the vbios:
http://people.freedesktop.org/~agd5f/get_vbios.txt

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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

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https://bugzilla.kernel.org/show_bug.cgi?id=23752


Rafael J. Wysocki <rjw@sisk.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |florian@mickler.org,
                   |                            |maciej.rutecki@gmail.com
             Blocks|                            |21782




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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

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https://bugzilla.kernel.org/show_bug.cgi?id=23752





--- Comment #2 from John W. Linville <linville@tuxdriver.com>  2010-11-26 00:01:24 ---
Created an attachment (id=38242)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=38242)
vbios.rom

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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

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https://bugzilla.kernel.org/show_bug.cgi?id=23752





--- Comment #3 from Alex Deucher <alexdeucher@gmail.com>  2010-11-30 00:48:31 ---
Created an attachment (id=38592)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=38592)
fix ddc line vbios bug

This patch should fix the issue and get the LCD EDID working as well.

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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

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https://bugzilla.kernel.org/show_bug.cgi?id=23752





--- Comment #4 from John W. Linville <linville@tuxdriver.com>  2010-11-30 02:44:36 ---
Seems good to me (i.e. boot is successful w/o using nomodeset)!  Not sure how
to check the EDID bit...?

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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

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https://bugzilla.kernel.org/show_bug.cgi?id=23752





--- Comment #5 from Alex Deucher <alexdeucher@gmail.com>  2010-11-30 05:14:14 ---
(In reply to comment #4)
> Seems good to me (i.e. boot is successful w/o using nomodeset)!  Not sure how
> to check the EDID bit...?

Great I'll send it to Dave.  xrandr --verbose will show you whether or not
there is an EDID for a particular output.  The panel timing is also available
via a table in the vbios so the EDID only supplies supplemental info (like
physical display size).

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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=23752


Florian Mickler <florian@mickler.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |CODE_FIX




--- Comment #6 from Florian Mickler <florian@mickler.org>  2010-11-30 10:44:18 ---
Patch: https://bugzilla.kernel.org/attachment.cgi?id=38592

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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

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https://bugzilla.kernel.org/show_bug.cgi?id=23752


Rafael J. Wysocki <rjw@sisk.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|CODE_FIX                    |PATCH_ALREADY_AVAILABLE




--- Comment #7 from Rafael J. Wysocki <rjw@sisk.pl>  2010-11-30 21:32:51 ---
Handled-By : Alex Deucher <alexdeucher@gmail.com>

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[Bug 23752] drm/radeon/kms -- hang during boot unless using "nomodeset"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=23752


Rafael J. Wysocki <rjw@sisk.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED
         Resolution|PATCH_ALREADY_AVAILABLE     |CODE_FIX




--- Comment #8 from Rafael J. Wysocki <rjw@sisk.pl>  2010-12-02 21:40:05 ---
Fixed by commit 3074adc drm/radeon/kms: add workaround for dce3 ddc line vbios
bug .

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