[natty] system freezes on boot without disabling KMS

[LGB [Gábor Lénárt]]

After upgrading maverick (x86 32 bit system but with PAE kernel) system does not boot, after some disk activity the upper half of the screen is filled with garbage and no more disk activity. Booting an older kernel (from maverick) works. Also it work with natty's kernel if I give radeon.modeset=0 parameter at grub but then there is now hw accel. Installing fglrx also fixes the boot issue but Unity does not work then (black boxes instead of the launcher, and the upper panel section etc). So for me this bug renders natty unusable.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-7-generic-pae 2.6.38-7.39
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic-pae 2.6.38
Uname: Linux 2.6.38-7-generic-pae i686
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: lgb 1770 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd6400000 irq 46'
   Mixer name : 'Realtek ALC268'
   Components : 'HDA:10ec0268,1179ff1e,00100003'
   Controls : 18
   Simple ctrls : 10
Date: Mon Apr 4 00:07:08 2011
HibernationDevice: RESUME=UUID=bc7a4732-4132-43eb-9ba8-8340cf011846
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: TOSHIBA Satellite A300
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic-pae root=UUID=14c446e2-e9e0-47a2-992e-f04d3f9b7bf3 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-7-generic-pae N/A
 linux-backports-modules-2.6.38-7-generic-pae N/A
 linux-firmware 1.49
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-03-13 (21 days ago)
WifiSyslog:

dmi.bios.date: 03/20/2009
dmi.bios.vendor: INSYDE
dmi.bios.version: 1.90
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvr1.90:bd03/20/2009:svnTOSHIBA:pnSatelliteA300:pvrPSAGCE-0KC00FHU:rvnTOSHIBA:rnPortablePC:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Satellite A300
dmi.product.version: PSAGCE-0KC00FHU
dmi.sys.vendor: TOSHIBA

[LGB [Gábor Lénárt] (lgb)]

Also, sorry for reposting this bug, it's reported as bug 735126 but it was about Xorg more, and I couldn't find out how to assign a single bug for more packages (if it is possible at all). Please visit that bug report too. I attach a file here (can be found at my other bug report too), it's got via netconsole and contains "interesting" messages when KMS is not disabled and fglrx is not installed, I guess those "stuck ..." things causes the system not to boot within any sane time.

[LGB [Gábor Lénárt] (lgb)]

I'm just wondering if it's known that unity can't be used with fglrx installed? It's one thing that my notebook freezes when booting natty with radeon driver and KMS enabled, but it works if I use fglrx, just then classic desktop must be used otherwise unity produces only black rectangles where launcher etc should be.