hub 8-0:1.0: over-current change on port 1

hub 8-0:1.0: over-current change on port 1
hub 2-0:1.0: over-current change on port 5

I don't know what does that means, but my dmesg is FULL of those!
Please see the following post on ubuntuforums:

http://ubuntuforums.org/showthread.php?t=1691226

I don't know if it helps, but there is a malfunctioning USB port on my laptop. Plugging an optical mouse into it, the port gives current to the mouse but the mouse does not work. In fact, the mouse has some lights which blink when it is plugged into the malfunctioning port and also the mouse pointer does not moves on the screen when the mouse is moved on my mouse pad.
On the other hand, when plugging the mouse into a functioning USB port, the lights do not blink any more (they just blink when the mouse is moved on my mouse pad) and moving the mouse on my mouse-pad makes the mouse pointer regularly move on the screen.

In case of inserting a USB Flash drive into the malfunctioning port I can get the following error message:
Error mounting: mount: /dev/sdc1: can't read superblock

or even no error message. In this last case, the flash memory can be not mounted at all or mounted for a while and then unmounted as when suddenly unplugged. Of course, the flesh memory works perfectly when plugging it into other usb ports of the same laptop.

Any suggestion, please?
Thanks.

Manolo

Ubuntu 10.10 on Acer Aspire 5730z
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: mano 1808 F.... pulseaudio
                      mano 10128 F.... TeamViewer.exe
 /dev/snd/pcmC0D0p: mano 1808 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf8900000 irq 21'
   Mixer name : 'Realtek ALC268'
   Components : 'HDA:10ec0268,10250141,00100101 HDA:11c11040,11c10001,00100200'
   Controls : 17
   Simple ctrls : 11
DistroRelease: Ubuntu 10.10
HibernationDevice: RESUME=UUID=22b909fb-78a3-41fa-9d67-6ba9893eea6c
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: Acer Aspire 5730
NonfreeKernelModules: sep3_1 pax
Package: linux (not installed)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=32511665-3b23-4aaa-8667-6d759d1fe31b ro vga=786 quiet splash
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=it_IT.utf8
 LC_MESSAGES=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Regression: No
RelatedPackageVersions: linux-firmware 1.38.5
Reproducible: Yes
Tags: maverick kernel-uncat needs-upstream-testing
Uname: Linux 2.6.32-22-generic x86_64
UserGroups: adm admin audio cdrom dialout fax fuse lp lpadmin netdev plugdev sambashare video
dmi.bios.date: 08/01/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.05
dmi.board.name: CathedralPeak
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.05:bd08/01/2008:svnAcer:pnAspire5730:pvr0100:rvnAcer:rnCathedralPeak:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5730
dmi.product.version: 0100
dmi.sys.vendor: Acer
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: mano 1808 F.... pulseaudio
                      mano 10128 F.... TeamViewer.exe
 /dev/snd/pcmC0D0p: mano 1808 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf8900000 irq 21'
   Mixer name : 'Realtek ALC268'
   Components : 'HDA:10ec0268,10250141,00100101 HDA:11c11040,11c10001,00100200'
   Controls : 17
   Simple ctrls : 11
DistroRelease: Ubuntu 10.10
HibernationDevice: RESUME=UUID=22b909fb-78a3-41fa-9d67-6ba9893eea6c
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: Acer Aspire 5730
NonfreeKernelModules: sep3_1 pax
Package: linux (not installed)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=32511665-3b23-4aaa-8667-6d759d1fe31b ro vga=786 quiet splash
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=it_IT.utf8
 LC_MESSAGES=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Regression: No
RelatedPackageVersions: linux-firmware 1.38.5
Reproducible: Yes
Tags: maverick kernel-uncat needs-upstream-testing
Uname: Linux 2.6.32-22-generic x86_64
UserGroups: adm admin audio cdrom dialout fax fuse lp lpadmin netdev plugdev sambashare video
dmi.bios.date: 08/01/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.05
dmi.board.name: CathedralPeak
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.05:bd08/01/2008:svnAcer:pnAspire5730:pvr0100:rvnAcer:rnCathedralPeak:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5730
dmi.product.version: 0100
dmi.sys.vendor: Acer
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: mano 1988 F.... pulseaudio
                      mano 3789 F.... TeamViewer.exe
 /dev/snd/pcmC0D0p: mano 1988 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf8900000 irq 47'
   Mixer name : 'Realtek ALC268'
   Components : 'HDA:10ec0268,10250141,00100101 HDA:11c11040,11c10001,00100200'
   Controls : 17
   Simple ctrls : 11
DistroRelease: Ubuntu 10.10
HibernationDevice: RESUME=UUID=22b909fb-78a3-41fa-9d67-6ba9893eea6c
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: Acer Aspire 5730
Package: linux 2.6.35.28.36
PackageArchitecture: amd64
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-28-generic root=UUID=32511665-3b23-4aaa-8667-6d759d1fe31b ro vga=786 quiet splash
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=it_IT.utf8
 LC_MESSAGES=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.35-28.49-generic 2.6.35.11
Regression: No
RelatedPackageVersions: linux-firmware 1.38.5
Reproducible: Yes
Tags: maverick kernel-uncat needs-upstream-testing
Uname: Linux 2.6.35-28-generic x86_64
UserGroups: adm admin audio cdrom dialout fax fuse lp lpadmin netdev plugdev sambashare video
dmi.bios.date: 08/01/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.05
dmi.board.name: CathedralPeak
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.05:bd08/01/2008:svnAcer:pnAspire5730:pvr0100:rvnAcer:rnCathedralPeak:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5730
dmi.product.version: 0100
dmi.sys.vendor: Acer