lucid will not resume after suspend on Dell Insprion 600m

[spinlock]

There is a bug in the radeon driver in the Lucid release which causes my system - Dell Inspiron 600m - to hang after suspend. It will go into a suspend state fine but it will not come back up when I press the power key. The system does seem to rev up but the screen stays black and I have to do a hard restart and reboot.

This but was not an issue in the 2.6.28 version of linux. For those kernels, suspend (including closing and opening the laptop lid) worked as expected.

I have found a workaround in the 2.6.32 kernel. I have recompiled my kernel from the source in git and edited the configuration so that modsetting on radeon is not enabled by default:

    Device Drivers -->
        Graphics support -->
            Direct Rendering Manager -->
                <M> ATI Radeon
                  [ ] Enable modsetting on radeon by default - New Driver

In the generic config "Enable modsetting on radeon by default - New Driver" is selected.

Compiling and installing a kernel with this change will fix the suspend issue (though the graphics are degraded some).

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-25-generic 2.6.32-25.45
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-25.45-generic 2.6.32.21+drm33.7
Uname: Linux 2.6.32-25-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: spinlock 1125 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with STAC9750,51 at irq 5'
   Mixer name : 'SigmaTel STAC9750,51'
   Components : 'AC97a:83847650'
   Controls : 38
   Simple ctrls : 24
CheckboxSubmission: 0b29255429f4536ef6d8c74ec66778f0
CheckboxSystem: efd05939b08abfe86caa44c3820f8e56
Date: Fri Oct 22 16:57:18 2010
HibernationDevice: RESUME=UUID=d7e4ff0f-87f1-4f75-a5f4-4bcf6e363cc1
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4)
Lsusb:
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Computer Corporation Inspiron 600m
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   product info: "O2Micro", "SmartCardBus Reader", "V1.0", ""
   manfid: 0xffff, 0x0001
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   5.0V 16-bit PC Card
   Subdevice 0 (function 0) [unbound]
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-25-generic root=UUID=569b3a37-0e47-4e04-b1e6-0d7e60fa951f ro crashkernel=384M-2G:64M,2G-:128M quiet splash
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.1
RfKill:

SourcePackage: linux
dmi.bios.date: 06/01/2004
dmi.bios.vendor: Dell Computer Corporation
dmi.bios.version: A12
dmi.board.name: 0G5152
dmi.board.vendor: Dell Computer Corporation
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Computer Corporation
dmi.modalias: dmi:bvnDellComputerCorporation:bvrA12:bd06/01/2004:svnDellComputerCorporation:pnInspiron600m:pvr:rvnDellComputerCorporation:rn0G5152:rvr:cvnDellComputerCorporation:ct8:cvr:
dmi.product.name: Inspiron 600m
dmi.sys.vendor: Dell Computer Corporation