On Sun, 2009-08-16 at 23:12 +0200, Lennart Poettering wrote: > On Tue, 11.08.09 00:48, Maxim Levitsky (maximlevitsky at gmail.com) wrote: > > > > > Small progress, this only happens with pulse backend of canberra, which > > > > isn't used in 9.04, which explains why I see that bug now. > > > > It is probably the canberra bug, maybe it doesn't tell pulse that sound > > > > is mono? (I think that notify sounds are mono) > > > > > > Hmm, Ubuntu didn't use the pa backend for libcanberra? Oh my! > > > > > > Hmm, we had some recent changes in the surround sound handling in > > > libcanberra. Which version are you running? > > > > I pulled it from git repository. > > > > git log > > > > commit 605aee559f5bd6d53c4c93a9c3bbeefdcf10cad2 > > Author: Lennart Poettering <lennart at poettering.net> > > Date: Wed Aug 5 03:19:44 2009 +0200 > > > > prepare release 0.15 > > > > commit 593511bad132e0d262780918cce469ad69804b52 > > Author: Lennart Poettering <lennart at poettering.net> > > Date: Tue Aug 4 01:55:53 2009 +0200 > > > > gtk: don't take gdk lock since it is not recursive and it might > > already be taken > > > That's pretty recent. ;-) > > Hmm, could you please file a bug on fdo's bz, so that I don't forget > about looking into this? https://bugs.freedesktop.org/show_bug.cgi?id=23358 > > > > > Just one issue though. If a stream is played at low volume, and I click > > > > a button, a noise sound is emmited and it almost covers the notify > > > > sound. > > > > maybe this is a HW fault, or I suspect that PA reconfigures the played > > > > sound to play at lower volume, and this gives that noise sound. Anyway > > > > this is a bug. > > > > > > I don't follow. Could you explain this again? > > Sure! > > > > > > Let say I start a music player, and set its PA stream volume to low > > (rhythbox for example does that) > > > > Now I click on a button. > > > > Now what happens: > > > > 1 - PA sets hardware volume to high > > 2 - PA lowers music stream volume to low, so it plays at same volume. > > 3 - PA plays the notify sound. > > > > What is wrong is that the above sequence triggers a short noise, which > > origin isn't yet known to me (also it is possible to hear the music at > > high volume for a moment). > > Hmm, the short noise might be a problem with the volume setting > funcitonality of your driver/hw? Can you trigger it by low-level alsa > volume changes? Otherwise it might be triggered by a faulty > snd_pcm_rewind() implementation in your driver? Could be, but like I said, this sometimes is a hardware limitation of the hardware. I use typical snd-hda-intel with realtec ALC268 codec > > There is a little race here indeed, since we cannot change the mixer > volume and update our PCM data atomically at the same time. Usually > the hw mixer change should come first, the PCM data adjustment second, > which means this should annoy only if the overall volume is increased, > not when it is decreased. > > In my checkout i have now modified the flat volume logic so that sink > input volume changes can increase the sink volume, but they never > dcrease it again. As a side effect this will make your problem go away > since a corollary of this is that a stream volume is always <= the > sink volume, meaning that for event sounds the sink volume is never > increased. > > This new logic hence makes the sink volume something of a "barrier" > for sink input volumes. By default, no stream can increase the sink > volume beyond what was configured by the user. This is very welcome change on its own, it was really annoying that applications would hijack the master volume otherwise. > > > Since the notify sound is itself very short, it is almost replaced by > > this noise. > > > > It is ether a hick-up in PA, while it changes the stream volume, or a > > hardware problem. > > Could be a driver problem, too. Which driver is this? > > > I do like the idea of flat volumes though, this is quite right, and nice > > addition. However in case this is a hardware fault, I think that final > > volume of a card should also be software one, and hardware volume set to > > high. > > > > I don't know about this sound codec, but I do know that many sound cards > > like to emit all kinds of noises, when their volumes are touched. > > According to Takashi noises like this and when playback is > started/stopped should be considered driver problems and be fixed in > software. So please make sure to file a bug against your driver! I investigate a bit more. Best regards, Maxim Levitky > > Lennart > > -- > Lennart Poettering Red Hat, Inc. > lennart [at] poettering [dot] net > http://0pointer.net/lennart/ GnuPG 0x1A015CC4 > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at mail.0pointer.de > https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss
