npviewer.bin uses too much cpu

Bug #703301 reported by Chrescht on 2011-01-15
This bug affects 6 people
Affects Status Importance Assigned to Milestone
nspluginwrapper (Ubuntu)

Bug Description

Binary package hint: nspluginwrapper

When browsing some web-pages with flash the npviewer.bin process is using way too much cpu and memory.
top shows this:
7195 user 20 0 167m 74m 15m R 54 7.5 5:08.64 npviewer.bin
54% CPU on a Pentium D 3.4GHz is a lot, and so is 7.5% of 1Gb of RAM.
A sample page is this one:

Output of ps ax| grep npviewer:
7195 ? Rl 4:56 /usr/lib/nspluginwrapper/i386/linux/npviewer.bin --plugin /usr/lib/flashplugin-installer/ --connection /org/wrapper/NSPlugins/

Moreover I have found this segfault in syslog:
Jan 14 16:31:49 celsius kernel: [ 3080.799775] npviewer.bin[5073]: segfault at f3c9404c ip 00000000f61c2ee7 sp 00000000fff26190 error 4 in[f5e23000+b2e000]


ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: nspluginwrapper 1.2.2-0ubuntu7
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic
Uname: Linux 2.6.35-24-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sat Jan 15 16:32:16 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
 PATH=(custom, no user)
SourcePackage: nspluginwrapper

Chrescht (sekateur) wrote :
A Edwards (abedwardsw) wrote :

I have the exact same issues here running Ubuntu 10.04:

nspluginwrapper 1.2.2-0ubuntu6.10.04.1

2.6.32-28-generic #55-Ubuntu SMP Mon Jan 10 23:42:43 UTC 2011 x86_64 GNU/Linux

I have the same problem on open-source radeon driver with dri rendering working ok, Ubuntu 10.10. So it seems like this bug doesn't depend on video driver used (nvidia used by original reporter, radeon is on mine machine).

F.e. on page: I get 60-70% CPU load (Core 2 Duo P8600 @ 2.40GHz) and high fan activity and quite hot laptop surface.

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in nspluginwrapper (Ubuntu):
status: New → Confirmed
Michael (michaeljt) wrote :

I see this too when listening to music linked to from <>, and notably when the music page is open but not playing. Using gnash as my flash player, but I wonder whether this is a bug in software supplied by Ubuntu or in the web page? Are there any duplicates for this in Launchpad? "npviewer.bin cpu" is clearly a sufficiently popular Google search that it pops up in their search suggestions with a ready-cached result list.

Michael (michaeljt) wrote :

I note that the CPU usage increases with every new piece of music I listen to if I don't actively close the window after the last one finishes. As mentioned, the usage does not decrease after the music ends. Presumably a new flash app is started each time but the old ones are never ended, but again this may be a bug in the web page.

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