Okay. I dug a bit deeper and this issue is caused by the AppArmor
profile shipped with Firefox that I have enabled. The syslog contains
following entries from AppArmor when running Firefox e10s enabled and
the firefox profile in enforce mode:
audit: type=1400 audit(1474776774.198:579): apparmor="DENIED"
operation="mknod" profile="/usr/lib/firefox/firefox{,*[^s][^h]}"
name="/dev/shm/org.chromium.h4apSY" pid=5022 comm=57656220436F6E74656E74
requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000
audit: type=1400 audit(1474776774.222:580): apparmor="DENIED"
operation="mknod" profile="/usr/lib/firefox/firefox{,*[^s][^h]}"
name="/dev/shm/org.chromium.VpQMbW" pid=5022 comm=57656220436F6E74656E74
requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000
So Firefox tries to access /dev/shm but the default AppArmor profile
denies it. So the profile needs to be changed to make it compatible with
e10s.
** Summary changed:
- Web pages not rendering with e10s enabled
+ Web pages not rendering with e10s enabled and AppArmor profile in enforce mode
** Description changed:
STR:
- 1. Open Firefox 49 with clean profile
+ 0. Enable enforce mode for the Firefox app-armor profile: sudo aa-enforce
usr.bin.firefox
+ 1. Open Firefox 49 with clean profile (or force-enable e10s as per
https://wiki.mozilla.org/Electrolysis#Force_Enable and restart Firefox)
2. Go to any site
What happens: The site loads but the content is rendered blank. The page
is loaded properly since I can hover over (invisible) links and see the
cursor change & the address to be shown in the bottom of the window.
What should happen: The site is rendered properly.
- This is related to e10s and how the Ubuntu builds are configured / built:
- * If e10s is disabled, everything works fine.
- * If I download Firefox 49 release build built by Mozilla, pages are rendered
correctly with both e10s and non-e10s windows.
-
- If I execute firefox from the command line, I see the following output
repeated constantly:
- [GFX1]: Failed 2 buffer db=0 dw=0 for 1356, 0, 64, 673
- [GFX1]: Failed 2 buffer db=0 dw=0 for 0, 0, 64, 500
- ... continues forever with different coordinates
+ This is related to e10s and the default AppArmor profile shipped with
+ firefox.
See the attached screenshot for how the first-run page looks like with a
- clean profile.
+ clean profile, e10s and AppArmor enabled.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: firefox 49.0+build4-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
- AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: sami 2154 F.... pulseaudio
BuildID: 20160920074044
Channel: Unavailable
CurrentDesktop: Unity
Date: Sat Sep 24 07:38:09 2016
DefaultProfileExtensions: extensions.sqlite corrupt or missing
DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant
compatibility.ini or extensions.sqlite)
DefaultProfileLocales: extensions.sqlite corrupt or missing
DefaultProfilePlugins: Shockwave Flash -
/usr/lib/adobe-flashplugin/libflashplayer.so (adobe-flashplugin)
DefaultProfilePrefSources: prefs.js
DefaultProfileThemes: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
- IfupdownConfig:
- # interfaces(5) file used by ifup(8) and ifdown(8)
- auto lo
- iface lo inet loopback
- IpRoute:
- default via 192.168.0.1 dev wlan0 proto static metric 600
- 169.254.0.0/16 dev wlan0 scope link metric 1000
- 192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.11 metric
600
- MostRecentCrashID: bp-f39a0daf-a559-4d71-813b-3403e2151223
- Profile1Extensions: extensions.sqlite corrupt or missing
- Profile1IncompatibleExtensions: Unavailable (corrupt or non-existant
compatibility.ini or extensions.sqlite)
- Profile1Locales: extensions.sqlite corrupt or missing
- Profile1PrefSources: prefs.js
- Profile1Themes: extensions.sqlite corrupt or missing
- Profile2Extensions: extensions.sqlite corrupt or missing
- Profile2IncompatibleExtensions: Unavailable (corrupt or non-existant
compatibility.ini or extensions.sqlite)
- Profile2Locales: extensions.sqlite corrupt or missing
- Profile2Plugins: Shockwave Flash -
/usr/lib/adobe-flashplugin/libflashplayer.so (adobe-flashplugin)
- Profile2PrefSources: prefs.js
- Profile2Themes: extensions.sqlite corrupt or missing
- Profiles:
- Profile0 (Default) - LastVersion=49.0/20160920074044 (In use)
- Profile1 - LastVersion=48.0/20160728203720 (Out of date)
- Profile2 - LastVersion=44.0a1/20151027030239 (Out of date)
RunningIncompatibleAddons: False
SourcePackage: firefox
- SubmittedCrashIDs:
- bp-f39a0daf-a559-4d71-813b-3403e2151223
- bp-fb9e28fa-1e38-4c9b-9b18-beeea2151222
- bp-0d0ac494-189a-42b2-addf-852f62151119
- bp-6033c3ae-3d54-425f-8e39-f7ad72151113
- bp-12fc418e-bdf6-42c1-a648-e102d2151107
- UpgradeStatus: No upgrade log present (probably fresh install)
- dmi.bios.date: 11/19/2012
- dmi.bios.vendor: American Megatrends Inc.
- dmi.bios.version: K56CM.209
- dmi.board.asset.tag: ATN12345678901234567
- dmi.board.name: K56CM
- dmi.board.vendor: ASUSTeK COMPUTER INC.
- dmi.board.version: 1.0
- dmi.chassis.asset.tag: No Asset Tag
- dmi.chassis.type: 10
- dmi.chassis.vendor: ASUSTeK COMPUTER INC.
- dmi.chassis.version: 1.0
- dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrK56CM.209:bd11/19/2012:svnASUSTeKCOMPUTERINC.:pnK56CM:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnK56CM:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
- dmi.product.name: K56CM
- dmi.product.version: 1.0
- dmi.sys.vendor: ASUSTeK COMPUTER INC.
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https://bugs.launchpad.net/bugs/1627239
Title:
Web pages not rendering with e10s enabled and AppArmor profile in
enforce mode
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