It turns out /dev/nvidia-modeset is a red herring. If I add the following line to /etc/apparmor.d/local/usr.bin.firefox:
/dev/shm/org.chromium* rw, the refresh problems disappear. ** Summary changed: - refresh problems with multi-process + refresh problems with multi-process and AppArmor -- 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/1660051 Title: refresh problems with multi-process and AppArmor Status in firefox package in Ubuntu: New Bug description: With Ubuntu's build of Firefox 51, enabling multi-process produces refresh problems when switching tabs. In detail, here is what I did: 1) create a new profile 2) start firefox with that new profile (so no add-ons) 3) display "about:support" and check that multi-process is on 4) open a few other tabs on various web pages 5) switch between tabs: most of the time, the display is not refreshed, the old tab's contents is still there Then I tried Mozilla's officiel build of Firefox 51 for Linux (specifically the French x86-64 version), and I had no problems: display is refreshed when I switch tabs. There must be something different in the Ubuntu build. Note I have a NVidia card and use the proprietary driver (I'm assuming detailed info is uploaded as part of the bug report process?). Additional information: I have Ubuntu's AppArmor profile for Firefox enabled. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: firefox 51.0.1+build2-0ubuntu0.16.04.1 ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35 Uname: Linux 4.4.0-59-generic x86_64 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl nvidia_uvm nvidia_drm nvidia_modeset nvidia AddonCompatCheckDisabled: False ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 BuildID: 20170125172221 Channel: Unavailable CurrentDesktop: XFCE Date: Sat Jan 28 17:55:13 2017 DefaultProfileIncompatibleExtensions: Default - {972ce4c6-7e08-4474-a285-3208198ce6fd} DefaultProfilePlugins: IcedTea-Web Plugin (using IcedTea-Web 1.6.2 (1.6.2-3ubuntu1)) - /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so (icedtea-8-plugin) bjninstallplugin - /usr/lib/firefox-addons/plugins/npbjninstallplugin_2.180.71.8.so bjnplugin - /usr/lib/firefox-addons/plugins/npbjnplugin_2.180.71.8.so Google Talk Plugin Video Renderer - /opt/google/talkplugin/libnpo1d.so (google-talkplugin) Google Talk Plugin - /opt/google/talkplugin/libnpgoogletalk.so (google-talkplugin) DefaultProfilePrefErrors: 'utf-8' codec can't decode byte 0xe9 in position 7414: invalid continuation byte DefaultProfilePrefSources: [Profile]/extensions/masterpasswordtimeoutplus@vano/defaults/preferences/masterpasswordplus.js ForcedLayersAccel: False IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2013-04-12 (1386 days ago) InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130409) MostRecentCrashID: bp-eb109c63-e3b5-4c21-a920-d262b2150407 Profile1Extensions: extensions.sqlite corrupt or missing Profile1IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) Profile1Locales: extensions.sqlite corrupt or missing Profile1Plugins: Google Talk Plugin Video Renderer - /opt/google/talkplugin/libnpo1d.so (google-talkplugin) Google Talk Plugin - /opt/google/talkplugin/libnpgoogletalk.so (google-talkplugin) IcedTea-Web Plugin (using IcedTea-Web 1.6.2 (1.6.2-3ubuntu1)) - /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so (icedtea-8-plugin) bjninstallplugin - /usr/lib/firefox-addons/plugins/npbjninstallplugin_2.180.71.8.so bjnplugin - /usr/lib/firefox-addons/plugins/npbjnplugin_2.180.71.8.so Profile1PrefSources: prefs.js Profile1Themes: extensions.sqlite corrupt or missing Profiles: Profile0 (Default) - LastVersion=51.0.1/20170125172221 (In use) Profile1 - LastVersion=51.0.1/20170125094131 (Out of date) RfKill: RunningIncompatibleAddons: True SourcePackage: firefox UpgradeStatus: Upgraded to xenial on 2015-07-27 (550 days ago) dmi.bios.date: 06/22/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1801 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P8H67-M EVO 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.:bvr1801:bd06/22/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8H67-MEVO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1660051/+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
