Public bug reported:

We had that one fixed but it occured again on the 29th of August.

This was the cause:

Start-Date: 2011-08-29  20:36:27
Upgrade: meld:amd64 (1.5.0-0ubuntu1, 1.5.0-0ubuntu1.1), bluez-alsa:amd64 
(4.91-0ubuntu1, 4.91-0ubuntu2), unity:amd64 (3.8.16-0ubuntu1~natty1, 
3.8.16-0ubuntu1~natty2), libecryptfs0:amd64 (87-0ubuntu1.1, 87-0ubuntu1.2), 
libwxbase2.8-0:amd64 (2.8.11.0-0ubuntu8, 2.8.11.0-0ubuntu8.1), gvfs-fuse:amd64 
(1.8.0-0ubuntu2, 1.8.0-0ubuntu3), nvidia-common:amd64 (0.2.30, 0.2.30.1), 
bluez-gstreamer:amd64 (4.91-0ubuntu1, 4.91-0ubuntu2), clamav:amd64 
(0.97+dfsg-2ubuntu1.1, 0.97.2+dfsg-1ubuntu1.11.04), gvfs-backends:amd64 
(1.8.0-0ubuntu2, 1.8.0-0ubuntu3), chromium-browser:amd64 
(13.0.782.107~r94237-0ubuntu0.11.04.1, 13.0.782.215~r97094-0ubuntu0.11.04.1), 
gir1.2-dbusmenu-glib-0.4:amd64 (0.4.3-0ubuntu3, 0.4.3-0ubuntu4), 
unity-common:amd64 (3.8.16-0ubuntu1~natty1, 3.8.16-0ubuntu1~natty2), 
libgl1-mesa-dri:amd64 (7.10.2-0ubuntu2, 7.10.2-0ubuntu2.1), bluez-cups:amd64 
(4.91-0ubuntu1, 4.91-0ubuntu2), foomatic-filters:amd64 (4.0.7-0ubuntu1, 
4.0.7-0ubuntu1.1), firefox-globalmenu:amd64 
(5.0+build1+nobinonly-0ubuntu0.11.04.2, 6.0+build1+nobinonly-0ubuntu0.11.04.1), 
libgl1-mesa-glx:amd64 (7.10.2-0ubuntu2, 7.10.2-0ubuntu2.1), clamav-base:amd64 
(0.97+dfsg-2ubuntu1.1, 0.97.2+dfsg-1ubuntu1.11.04), apport:amd64 
(1.20.1-0ubuntu5, 1.20.1-0ubuntu5.1), libclamav6:amd64 (0.97+dfsg-2ubuntu1.1, 
0.97.2+dfsg-1ubuntu1.11.04), bluez:amd64 (4.91-0ubuntu1, 4.91-0ubuntu2), 
firefox-branding:amd64 (5.0+build1+nobinonly-0ubuntu0.11.04.2, 
6.0+build1+nobinonly-0ubuntu0.11.04.1), ecryptfs-utils:amd64 (87-0ubuntu1.1, 
87-0ubuntu1.2), duplicity:amd64 (0.6.13-0ubuntu1, 0.6.13-0ubuntu1.1), 
libxfont1:amd64 (1.4.3-2, 1.4.3-2ubuntu0.1), firefox:amd64 
(5.0+build1+nobinonly-0ubuntu0.11.04.2, 6.0+build1+nobinonly-0ubuntu0.11.04.1), 
grub-gfxpayload-lists:amd64 (0.2.1, 0.2.2), chromium-browser-l10n:amd64 
(13.0.782.107~r94237-0ubuntu0.11.04.1, 13.0.782.215~r97094-0ubuntu0.11.04.1), 
chromium-codecs-ffmpeg:amd64 (13.0.782.107~r94237-0ubuntu0.11.04.1, 
13.0.782.215~r97094-0ubuntu0.11.04.1), libdbusmenu-glib3:amd64 (0.4.3-0ubuntu3, 
0.4.3-0ubuntu4), libwxgtk2.8-0:amd64 (2.8.11.0-0ubuntu8, 2.8.11.0-0ubuntu8.1), 
python-problem-report:amd64 (1.20.1-0ubuntu5, 1.20.1-0ubuntu5.1), 
libdbusmenu-gtk3:amd64 (0.4.3-0ubuntu3, 0.4.3-0ubuntu4), 
firefox-locale-de:amd64 (5.0+build1+nobinonly-0ubuntu0.11.04.2, 
6.0+build1+nobinonly-0ubuntu0.11.04.1), firefox-locale-en:amd64 
(5.0+build1+nobinonly-0ubuntu0.11.04.2, 6.0+build1+nobinonly-0ubuntu0.11.04.1), 
flashplugin-installer:amd64 (10.3.183.4ubuntu0.11.04.1, 
10.3.183.7ubuntu0.11.04.1), isc-dhcp-client:amd64 (4.1.1-P1-15ubuntu9, 
4.1.1-P1-15ubuntu9.1), dhcp3-client:amd64 (4.1.1-P1-15ubuntu9, 
4.1.1-P1-15ubuntu9.1), clamav-freshclam:amd64 (0.97+dfsg-2ubuntu1.1, 
0.97.2+dfsg-1ubuntu1.11.04), python-apport:amd64 (1.20.1-0ubuntu5, 
1.20.1-0ubuntu5.1), chromium-browser-inspector:amd64 
(13.0.782.107~r94237-0ubuntu0.11.04.1, 13.0.782.215~r97094-0ubuntu0.11.04.1), 
libgvfscommon0:amd64 (1.8.0-0ubuntu2, 1.8.0-0ubuntu3), gvfs:amd64 
(1.8.0-0ubuntu2, 1.8.0-0ubuntu3), libglu1-mesa:amd64 (7.10.2-0ubuntu2, 
7.10.2-0ubuntu2.1), isc-dhcp-common:amd64 (4.1.1-P1-15ubuntu9, 
4.1.1-P1-15ubuntu9.1), apport-gtk:amd64 (1.20.1-0ubuntu5, 1.20.1-0ubuntu5.1), 
dhcp3-common:amd64 (4.1.1-P1-15ubuntu9, 4.1.1-P1-15ubuntu9.1), 
firefox-gnome-support:amd64 (5.0+build1+nobinonly-0ubuntu0.11.04.2, 
6.0+build1+nobinonly-0ubuntu0.11.04.1), libbluetooth3:amd64 (4.91-0ubuntu1, 
4.91-0ubuntu2), macfanctld:amd64 (0.5~mactel1~maverick, 0.5~mactel1)
End-Date: 2011-08-29  20:37:00

This is syslog:
Sep  1 18:11:56 wm kernel: [ 9203.085256] btusb_bulk_complete: hci0 corrupted 
ACL packet
Sep  1 18:11:56 wm kernel: [ 9203.085275] l2cap_recv_acldata: Unexpected 
continuation frame (len 1)
Sep  1 18:12:05 wm kernel: [ 9211.475985] btusb_bulk_complete: hci0 corrupted 
ACL packet
Sep  1 18:12:05 wm kernel: [ 9211.476143] l2cap_recv_acldata: Unexpected 
continuation frame (len 8)
Sep  1 18:12:17 wm kernel: [ 9223.516357] btusb_bulk_complete: hci0 corrupted 
ACL packet
Sep  1 18:12:17 wm kernel: [ 9223.516378] hci_acldata_packet: hci0 ACL packet 
for unknown connection handle 12
Sep  1 18:12:25 wm kernel: [ 9231.803456] btusb_bulk_complete: hci0 corrupted 
ACL packet
Sep  1 18:12:25 wm kernel: [ 9231.804012] hci_acldata_packet: hci0 ACL packet 
for unknown connection handle 12
Sep  1 18:12:55 wm kernel: [ 9262.013244] btusb_bulk_complete: hci0 corrupted 
ACL packet
Sep  1 18:12:55 wm kernel: [ 9262.013263] l2cap_recv_acldata: Unexpected 
continuation frame (len 1)
Sep  1 18:13:05 wm kernel: [ 9272.064749] btusb_bulk_complete: hci0 corrupted 
ACL packet
Sep  1 18:13:05 wm kernel: [ 9272.064768] hci_acldata_packet: hci0 ACL packet 
for unknown connection handle 12
Sep  1 18:13:05 wm kernel: [ 9272.064773] hci_acldata_packet: hci0 ACL packet 
for unknown connection handle 12

In the Bluetooth preferences, the mouse connects and disconnects in a
regular interval

This seems to be a regression to BUG 814250

Further information can be found in BUG 837206 (which I erroneously
attributed to Bluetooth stack).

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-11-generic 2.6.38-11.49
ProcVersionSignature: Ubuntu 2.6.38-11.49-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: nvidia wl
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: Cirrus Analog [Cirrus Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  wolf       2048 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xc1d00000 irq 42'
   Mixer name   : 'Cirrus Logic CS4206'
   Components   : 'HDA:10134206,106b0b00,00100301'
   Controls      : 17
   Simple ctrls  : 10
Card1.Amixer.info:
 Card hw:1 'NVidia'/'HDA NVidia at 0xc1080000 irq 16'
   Mixer name   : 'Nvidia GPU 0a HDMI/DP'
   Components   : 'HDA:10de000a,10de0101,00100100'
   Controls      : 16
   Simple ctrls  : 4
Date: Thu Sep  1 18:02:04 2011
HibernationDevice: RESUME=UUID=3886aa3f-a646-42e5-8a77-d4eecb87593e
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64+mac 
(20101008)
MachineType: Apple Inc. MacBookPro6,2
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=de_AT.UTF-8
 LC_MESSAGES=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic 
root=UUID=3c3557ca-1f0a-428b-be8d-07b30f05771c ro quiet splash pcie_aspm=force 
vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-11-generic N/A
 linux-backports-modules-2.6.38-11-generic  N/A
 linux-firmware                             1.52.1
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-04-30 (124 days ago)
dmi.bios.date: 07/26/10
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP61.88Z.0057.B0C.1007261552
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F22586C8
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro6,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F22586C8
dmi.modalias: 
dmi:bvnAppleInc.:bvrMBP61.88Z.0057.B0C.1007261552:bd07/26/10:svnAppleInc.:pnMacBookPro6,2:pvr1.0:rvnAppleInc.:rnMac-F22586C8:rvrMacBookPro6,2:cvnAppleInc.:ct10:cvrMac-F22586C8:
dmi.product.name: MacBookPro6,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug natty running-unity

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https://bugs.launchpad.net/bugs/838926

Title:
  Apple Magic Mouse stopped working again

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