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[Launchpad Bug Tracker <656589@xxxxxxxxxxxxxxxxxx>]

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I just freshly installed maverick rc on dell studio 1555. I had tried
latest kernel (2.6.36rcx) from mainline on lucid on the same machine and
ati open driver had no problem at all with KMS enabled. On maverick, KMS
enabled causes very slow performance (30-40 fps on kwin with no window).
If i disable kms with radeon.modeset=0 performance gets a lot better,
but un-minimizing windows on kde crashes x server. All info refer to kms
enabled.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.33
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  ashmi      1727 F.... pulseaudio
 /dev/snd/pcmC0D0p:   ashmi      1727 F...m pulseaudio
CRDA: Error: [Errno 2] Nessun file o directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfc500000 irq 47'
   Mixer name	: 'IDT 92HD73C1X5'
   Components	: 'HDA:111d7675,102802be,00100103'
   Controls      : 16
   Simple ctrls  : 10
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfc010000 irq 49'
   Mixer name	: 'ATI R6xx HDMI'
   Components	: 'HDA:1002aa01,00aa0100,00100100'
   Controls      : 4
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Fri Oct  8 01:39:16 2010
HibernationDevice: RESUME=UUID=b0b95cb1-c1da-4caa-ab8f-0652e7f1ef92
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release Candidate amd64 (20100928.3)
MachineType: Dell Inc. Studio 1555
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=UUID=db487786-75e4-479a-8e6e-4df9074adc7d ro quiet splash
ProcEnviron:
 LANGUAGE=
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
dmi.bios.date: 07/03/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0C234M
dmi.board.vendor: Dell Inc.
dmi.board.version: A07
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A07
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd07/03/2009:svnDellInc.:pnStudio1555:pvrA07:rvnDellInc.:rn0C234M:rvrA07:cvnDellInc.:ct8:cvrA07:
dmi.product.name: Studio 1555
dmi.product.version: A07
dmi.sys.vendor: Dell Inc.

** Affects: xserver-xorg-video-ati (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug kernel-power maverick needs-upstream-testing resume suspend
-- 
Slow graphics on ati 4570 with kms on, X crash with kms off
https://bugs.launchpad.net/bugs/656589
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