[Bug 37442] New: Radeon 9600 Mobile (RV350) freezes on glxgears - bisected

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https://bugzilla.kernel.org/show_bug.cgi?id=37442

           Summary: Radeon 9600 Mobile (RV350) freezes on glxgears -
                    bisected
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.39
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: w.sang@pengutronix.de
                CC: airlied@linux.ie
        Regression: Yes


Created an attachment (id=61872)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=61872)
kernelconfig

Since 2.6.39 and also with 3.0-rc2, when starting glxgears, my machine freezes
(as in "even caps/lock does not respond anymore"). Despite that, X-Server and
2D-stuff (shells, browsers) work fine all the time. Bisecting resulted in:

8410ea3b95d105a5be5db501656f44bbb91197c1 is the first bad commit
commit 8410ea3b95d105a5be5db501656f44bbb91197c1
Author: Dave Airlie <airlied@gmail.com>
Date:   Wed Dec 15 03:16:38 2010 +1000

    drm: rework PCI/platform driver interface.

    This abstracts the pci/platform interface out a step further,
    we can go further but this is far enough for now to allow USB
    to be plugged in.

    The drivers now just call the init code directly for their
    device type.

    Signed-off-by: Dave Airlie <airlied@redhat.com>

I can confirm that 2.6.38-rc5 worked fine and 2.6.39 with this commit reverted
(and manually disabled drm_usb) works fine, too. Seems really to be the
culprit.

Note: I don't have DRM_RADEON_KMS enabled, if I do, there is no crash (but the
framerate drops from 260fps to 13 fps).

lspci:

01:00.0 VGA compatible controller: ATI Technologies Inc RV350 [Mobility Radeon
9600 M10] (prog-if 00 [VGA controller])
    Subsystem: Fujitsu Technology Solutions Device 106b
    Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 11
    Memory at d0000000 (32-bit, prefetchable) [size=128M]
    I/O ports at b000 [size=256]
    Memory at ffcf0000 (32-bit, non-prefetchable) [size=64K]
    Expansion ROM at ffcc0000 [disabled] [size=128K]
    Capabilities: [58] AGP version 2.0
    Capabilities: [50] Power Management version 2
    Kernel driver in use: radeonfb

xorg.conf (changing options here did not have an effect):

Section "Device"
        Identifier      "Generic Video Card"
        Driver          "radeon"
        Option          "DynamicPM"             "on"
# Driver warns about FastWrite!
#       Option          "AGPFastWrite"          "on"
# Don't try EXA! Very slow on this card!
        Option          "AccelMethod"           "XAA"
# 4 does not work and freezes the machine :(
        Option          "AGPMode"               "2"
        Option          "EnablePageFlip"        "on"
EndSection

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