Hi Gerald, On Fri, 2016-06-17 at 23:57 +0200, Gerald Pfeifer wrote: > Hi guys, > > I am wondering whether any of you also get hit by the "Additional > Multimedia Codecs Required" denial-of-service attack with GNOME on > Tumbleweed (and what to possibly do about it)?
Luckily not, but reading below, I also know why I'm not hit by it > In a nutshell, now and then, out of a sudden, without any trigger > that I could see > > "Additional Multimedi Codecs Required" > "An application is requesting additional multimedia codecs" 'some' application is requesting a codec - and does so in a very stupid way if I may add (without waiting for the outcome and without remembering, that it already asked for it) > shows up in the notification area. At a rate of two or perhaps > three per second. A sane app should be aware that thus would take the user time - and asking this often can't be useful > Sometimes it goes away after a bit (in particular various attempts > and arbitrary mouse clicking?), sometimes <Alt><F2> "r" <Return> > helps. > > Debugging this I guess it might be related to the following repeating > N times (in journalctl)? > > Jun 17 23:41:30 anthias.pfeifer.com kde4-kopete.desktop[2566]: ** > Message: PackageKit: xid = 0 > Jun 17 23:41:30 anthias.pfeifer.com kde4-kopete.desktop[2566]: ** > Message: PackageKit: desktop_id = (null) > Jun 17 23:41:30 anthias.pfeifer.com kde4-kopete.desktop[2566]: ** > Message: PackageKit: Codec nice name: Vorbis decoder > Jun 17 23:41:30 anthias.pfeifer.com kde4-kopete.desktop[2566]: ** > Message: PackageKit: ignoring field named streamheader > Jun 17 23:41:30 anthias.pfeifer.com kde4-kopete.desktop[2566]: ** > Message: PackageKit: structure: gstreamer1(decoder-audio/x- > vorbis)()(64bit) This is absolutely the reason. And as I don't use kopete, it explains why I don't see it. In first instance, I suggest to file a bug against kopete right away - their codec-requesting code must be reworked > Still, is there a way to set some rate limiting on the GNOME > notification side? (If not, might that be considered a useful > addition?) Interesting idea - I filed it as a bug upstream as a suggestion: https://bugzilla.gnome.org/show_bug.cgi?id=767809 Cheers, Dominique
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