[Bug 539163] Re: [Dell Latitude D600][Radeon RV250/Mobility FireGL 9000] Desktop effects/compiz: dim display when zooming

[Andreas Modinos]

** Tags added: xorg-needs-kernel-fix

** Description changed:

  Running Lucid Alpha with todays updates I have some interesting visual
  effects:
  
  Zooming in with Super+Scroll causes the screen to become very dark. It
  looks like the backlight on the display turns off, but I'm not sure.
  Adjusting Fn+Brightness doesn't fix this, although I can tell the
  brightness changing slightly. The same thing happens when changing
  workspaces (Ctrl+Alt+-> or Ctrl+Alt+<-), dragging a window from one
  workspace to another, or using Expo (Super+E) to view all workspaces
  simultaneously. Returning to normal zoom level will always restore the
  correct level of brightness, corresponding to how it might have been
  adjusted during black out.
  
  I'm reporting this against the kernel and not the display driver because
- the bug doesn't appear with the corresponding mainline kernel release
- (2.6.32.9).
+ the bug goes away when testing the mainline kernel (which AFAIK does not
+ use modesetting by default) and by appending nomodeset to kernel boot
+ parameters.
  
  Attachments to follow...
- --- 
+ ---
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
  Architecture: i386
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  andreas    1416 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  andreas    1416 F.... pulseaudio
  CRDA: Error: [Errno 2] Tiedostoa tai hakemistoa ei ole
  Card0.Amixer.info:
-  Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with STAC9750,51 at irq 7'
-    Mixer name	: 'SigmaTel STAC9750,51'
-    Components	: 'AC97a:83847650'
-    Controls      : 38
-    Simple ctrls  : 24
+  Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with STAC9750,51 at irq 7'
+    Mixer name	: 'SigmaTel STAC9750,51'
+    Components	: 'AC97a:83847650'
+    Controls      : 38
+    Simple ctrls  : 24
  DistroRelease: Ubuntu 10.04
  HibernationDevice: RESUME=UUID=30e3faba-8e9e-4616-97ab-aae747c6a3b5
  InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100224.1)
  MachineType: Dell Computer Corporation Latitude D600
  Package: linux (not installed)
  PccardctlIdent:
-  Socket 0:
-    no product info available
-  Socket 1:
-    product info: "O2Micro", "SmartCardBus Reader", "V1.0", ""
-    manfid: 0xffff, 0x0001
+  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]
+  Socket 0:
+    no card
+  Socket 1:
+    5.0V 16-bit PC Card
+    Subdevice 0 (function 0) [unbound]
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-16-generic root=UUID=99ec916b-a551-4e75-85d2-60d165d6e870 ro quiet splash
  ProcEnviron:
-  LANG=fi_FI.utf8
-  SHELL=/bin/bash
+  LANG=fi_FI.utf8
+  SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.32-16.25-generic
  Regression: No
  RelatedPackageVersions: linux-firmware 1.32
  Reproducible: Yes
  RfKill:
-  0: hci0: Bluetooth
-  	Soft blocked: no
-  	Hard blocked: no
+  0: hci0: Bluetooth
+   Soft blocked: no
+   Hard blocked: no
  Tags: lucid needs-upstream-testing
  TestedUpstream: No
  Uname: Linux 2.6.32-16-generic i686
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 06/29/2005
  dmi.bios.vendor: Dell Computer Corporation
  dmi.bios.version: A16
  dmi.board.name: 0D2125
  dmi.board.vendor: Dell Computer Corporation
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Computer Corporation
  dmi.modalias: dmi:bvnDellComputerCorporation:bvrA16:bd06/29/2005:svnDellComputerCorporation:pnLatitudeD600:pvr:rvnDellComputerCorporation:rn0D2125:rvr:cvnDellComputerCorporation:ct8:cvr:
  dmi.product.name: Latitude D600
  dmi.sys.vendor: Dell Computer Corporation

-- 
[Dell Latitude D600][Radeon RV250/Mobility FireGL 9000] Desktop effects/compiz: dim display when zooming
https://bugs.launchpad.net/bugs/539163
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