Hi Dave, I uploaded some screen captures that paint a better picture of what's going on. Please see the attachments to my above comments.
You suggested that I attempt to ssh into the frozen VM and, if possible, look at relevant logs. I was able to access my VM when its desktop was frozen, but honestly, I don't know what logs I should be looking for. I did, however, run "top" and noticed that one root process was at over 100% cpu usage while the desktop was frozen. Please see "top.png" attached to Comment #19. With regard to the QEMU logs on my host, I found nothing noteworthy. I'm just a hobbyist, and tracking down bugs is a bit beyond my skill level. With that in mind, I hope maybe you or someone else who is more capable than me would be willing to create an Ubuntu 15.04 VM and look a little further into this. Who knows, maybe this is just a quirk of my system. But if someone else can reproduce what I'm seeing, then this is probably a pretty big issue, even if not always noticeable. Regards, GizmoChicken -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1432492 Title: Firefox and Thunderbird freezes entire system after a few seconds of use Status in The Mozilla Firefox Browser: New Status in firefox package in Ubuntu: Incomplete Bug description: Description: Ubuntu Vivid Vervet (development branch) Release: 15.04 firefox: Installed: 36.0.1+build2-0ubuntu1 Candidate: 36.0.1+build2-0ubuntu1 Version table: *** 36.0.1+build2-0ubuntu1 0 500 http://mirrors.accretive-networks.net/ubuntu/ vivid/main amd64 Packages 100 /var/lib/dpkg/status The whole system freezes after opening firefox. Hard reset required. Related bug: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1432488 ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: firefox 36.0.1+build2-0ubuntu1 ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1 Uname: Linux 3.19.0-9-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.16.2-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: black 1959 F.... pulseaudio /dev/snd/controlC0: black 1959 F.... pulseaudio BuildID: 20150306140302 Channel: Unavailable CurrentDesktop: Unity Date: Sun Mar 15 22:01:45 2015 EcryptfsInUse: Yes Extensions: extensions.sqlite corrupt or missing ForcedLayersAccel: False IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) InstallationDate: Installed on 2014-04-21 (329 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) IpRoute: default via 192.168.1.1 dev eth0 proto static metric 1024 169.254.0.0/16 dev eth0 scope link metric 1000 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.100 IwConfig: eth0 no wireless extensions. eth1 no wireless extensions. lo no wireless extensions. Locales: extensions.sqlite corrupt or missing MostRecentCrashID: bp-d89e64a8-90ce-4922-add5-6cfba2140512 PrefSources: prefs.js [Profile]/extensions/https-everywh...@eff.org/defaults/preferences/preferences.js [Profile]/extensions/{0AA9101C-D3C1-4129-A9B7-D778C6A17F82}/defaults/preferences/rikaichan.js Profiles: Profile0 (Default) - LastVersion=36.0.1/20150306140302 RelatedPackageVersions: google-talkplugin 5.38.5.0-1 rhythmbox-mozilla 3.1-1ubuntu2 RfKill: RunningIncompatibleAddons: False SourcePackage: firefox SubmittedCrashIDs: bp-d89e64a8-90ce-4922-add5-6cfba2140512 Themes: extensions.sqlite corrupt or missing UpgradeStatus: Upgraded to vivid on 2015-03-16 (0 days ago) dmi.bios.date: 05/19/2009 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1605 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: P6T DELUXE dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1605:bd05/19/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP6TDELUXE:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer no_proxy: localhost,127.0.0.0/8,::1 To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1432492/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
