From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sun, 13 May 2001 17:03:26 +0100 Subject: Re: Kernel sound problems (and misc) From: "Iain Sandoe" To: Bastien Nocera , LinuxPPC Dev Mime-version: 1.0 Content-type: text/plain; charset="US-ASCII" Message-Id: <20010513160247.E08682F05C@apollo.valhalla.net> Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Hi Bastien, > Ben's tree seems to already include Iain's dmasound patches, and showed > the same problem as when I applied the patches on an older kernel: when > booting (ie. when the sound is activated), the speakers are "hissing" > until I play something and stop it. Then it behaves correctly (ie. > there's no sound when I'm not playing any :P) Hmmm. I've obviously done something that means that dma is *not* halted on your machine at startup. This should be fairly easy to fix (but I'm away for a week - so next weekend). It doesn't happen on any of my machines - so perhaps something specific to burgundy. I don't know why this didn't make sense to me before ... I will look at this next w/e and send you a patch to test (unless someone else does it first ;-) > OK, there goes the main problem: mixer problems. There are 3 ways to > output sound on this iMac DV summer 2000 (OF tree still available from > tidbit.org). > - the front speakers: the preferred way obviously. Main volume is of no > use (doesn't do anything), the speakers volume goes from mute, or loud > to very loud. > - the front audio sockets: there aren't independant of the front > speakers, doesn't really matter, but that means it's not possible to > shut the sound of the speakers and listen to the music with a headphone. > It might be a hardware problem. > - the audio socket for external speakers on the left handside of the > machine: there's no volume control for them. Bringing down all the > volume controls shut off the front speakers (good), but there's no way > to raise or lower the sound on this output either. > > So, to sum it up, the main volume control does absolutely nothing on > this machine, and the speaker volume control is either mute, loud, or > very loud. I'd be glad to help on finding out the problem. This is, presumably, no change from the 'standard' version. This because there is still quite a lot of work to do on the iMac stuff - and we've only had the Darwin info for a little while ... I can only offer two solutions: 1. patience ... 2. send me a patch that fixes it ;-))) ciao, Iain. ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/