This bug occurs sporadically. It has never appeared in the recovery mode with simple graphics. From what I have found on the web it's connected to event issues (button remains as pressed in the system; release event seems to be missed by Ubuntu)
Let's say I try to view a video clip on YouTube. Afterwards I can use my cursor in Opera and click it's buttons and etc. But if I move cursor to Ubuntu menu and click - nothing happens. Alt+tab also seems not to work. I have to unplug and plug mouse cable to be able to use it once again.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-28-generic 2.6.35-28.49
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.35-28.49-generic 2.6.35.11
Uname: Linux 2.6.35-28-generic x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jv 1749 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xe9300000 irq 47'
Mixer name : 'Realtek ALC889A'
Components : 'HDA:10ec0885,1458a102,00100101'
Controls : 38
Simple ctrls : 21
Card1.Amixer.info:
Card hw:1 'HDMI'/'HDA ATI HDMI at 0xe5010000 irq 48'
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 Apr 1 19:50:14 2011
Frequency: Once a day.
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007.1)
MachineType: Gigabyte Technology Co., Ltd. EP45-DS3R
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-28-generic root=UUID=2653c680-6655-4eef-be64-247065dcc99d ro quiet splash
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38.5
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
dmi.bios.date: 08/18/2008
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F9
dmi.board.name: EP45-DS3R
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF9:bd08/18/2008:svnGigabyteTechnologyCo.,Ltd.:pnEP45-DS3R:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnEP45-DS3R:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: EP45-DS3R
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
On a Mythbuntu (Xubuntu 10.04 Lucid) system I noticed this begin with 2.6.32-29.
Booting to 2.6.32-28 resolves the issue.
I cannot see anything in the Changelog that indicates a change that would affect the input events.
The effect is as described by the original reporter - focus is captured by one window or application, and despite being able to click on other windows or the system menus, there is no response. I found that by clicking the middle and/or right buttons in the window that has captured focus, and without dismissing the resulting context menu pop-up, moving to another window or the system menu, I am able to then left-click to select. That gets dicey when the system menu captures focus though, getting out seems more difficult.