Messages in this thread | | | Date | Sat, 1 Apr 2006 08:11:42 +0200 | From | Vojtech Pavlik <> | Subject | Re: [patch 1/1] pc-speaker: add SND_SILENT |
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On Fri, Mar 31, 2006 at 11:06:35PM +0200, Edgar Toernig wrote: > Vojtech Pavlik wrote: > > > > On Fri, Mar 31, 2006 at 01:07:34AM +0200, Edgar Toernig wrote: > > > > > > Latency is no problem. I'm using a userspace daemon to emulate > > > the console beeper for about 6 months now and it work's very well. > > > > > > The daemon listens on /dev/input/eventX and when receiving a > > > > It needs to use /dev/input/uinput, not eventX. SND_TONE events are not > > sent to the event devices. > > Well, I get them - stock 2.6.16.
Oh, yes, you're right. But still, this will only work if a speaker device is present, so uinput is the right way to do it.
> > > Latency isn't noticable and memory footprint is small. > > > > It needs to have the sample ready in memory and not swapped out. Then > > the latency will be OK, but if it needs to read it in from the disk, it > > may be very noticeable. > > Yeah, if one ever cares one could mlock the samples, or (as I do) run > without swap. Fixing the 'air' latency of 3ms/m is harder though *g*
-- Vojtech Pavlik Director SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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