Just an update and another plea for help.. I'm now running 2.4.21 with ACPI and low-latency. The CPU-load and full-duplex problems still exist. This is on a Dell Inspiron 600m (Centrino). Could it be a problem with Centrino/i855/PCMCIA support in the kernel? lspci reports the CardBus and ISA bridges as unknown devices - here's the output:
=========================================== 00:00.0 Host bridge: Intel Corp.: Unknown device 3340 (rev 03) 00:01.0 PCI bridge: Intel Corp.: Unknown device 3341 (rev 03) 00:1d.0 USB Controller: Intel Corp. 82801DB USB (Hub #1) (rev 01) 00:1d.1 USB Controller: Intel Corp. 82801DB USB (Hub #2) (rev 01) 00:1d.2 USB Controller: Intel Corp. 82801DB USB (Hub #3) (rev 01) 00:1d.7 USB Controller: Intel Corp. 82801DB USB EHCI Controller (rev 01) 00:1e.0 PCI bridge: Intel Corp. 82801BAM/CAM PCI Bridge (rev 81) 00:1f.0 ISA bridge: Intel Corp.: Unknown device 24cc (rev 01) 00:1f.1 IDE interface: Intel Corp.: Unknown device 24ca (rev 01) 00:1f.5 Multimedia audio controller: Intel Corp. 82801DB AC'97 Audio (rev 01) 00:1f.6 Modem: Intel Corp. 82801DB AC'97 Modem (rev 01) 01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 Lf [Radeon Mobility 9000 M9] (rev 01) 02:01.0 CardBus bridge: O2 Micro, Inc.: Unknown device 7113 (rev 20) 02:01.1 CardBus bridge: O2 Micro, Inc.: Unknown device 7113 (rev 20) =========================================== Is anyone else seeing this with the VXpocket on another machine? I'm willing to provide whatever information it takes or even investigate code, but I don't know where to start. Thanks, Ben On Monday 23 June 2003 2:34 pm, you wrote: > I think I know how to stop the hum, but does anyone know what might > be causing the CPU load and full-duplex problems? I'm running kernel > 2.4.20 with low-latency, capabilities and ACPI patches (I've tried > booting with pci=noacpi and acpi=off without luck). > > Thanks, > Ben > > On Monday 16 June 2003 11:16 pm, Ben Saylor wrote: > > I recently bought a VXpocket v2 and managed to get it working with > > alsa 0.9.4, but I'm having a few problems with it. > > > > Whenever it's in use by an application, system CPU usage goes up to > > 40-70% and stays there, depending on the application. > > > > If I run pd with -alsa, I get "audio I/O stuck... closing audio" > > unless I add -noadc. Pd with -oss doesn't give that error, but > > tends to lock up the system. > > > > Is it possible to control the headphone level independently of the > > normal output levels? Also, the headphone output has a terrible > > ground loop hum when my laptop and speakers are attached and > > plugged in. The same hum can also be heard in the normal outputs, > > but it's much quieter. My speakers have balanced inputs and are > > attached by balanced cables. > > > > I'm guessing the buzz is a hardware issue I'll have to live with or > > fix with an adaptor of some kind. On the other hand, getting rid > > of the buzz was one of the main reasons I decided to buy a separate > > audio interface, so this is rather troubling. I chose the VXpocket > > over a USB interface (probably the Audiophile USB) because I read > > that the latency with current USB 1.1 interfaces is somewhat high, > > and I'd like to be able to play my guitar through it. Is this true > > with alsa? Also, are USB interfaces with external power supplies > > immune to ground loops and interference noise (e.g. from other USB > > devices)? > > > > Thanks, > > Ben > > > > > > > > ------------------------------------------------------- > > This SF.Net email is sponsored by: INetU > > Attention Web Developers & Consultants: Become An INetU Hosting > > Partner. Refer Dedicated Servers. We Manage Them. You Get 10% > > Monthly Commission! INetU Dedicated Managed Hosting > > http://www.inetu.net/partner/index.php > > _______________________________________________ > > Alsa-user mailing list > > [EMAIL PROTECTED] > > https://lists.sourceforge.net/lists/listinfo/alsa-user ------------------------------------------------------- This SF.Net email sponsored by: Free pre-built ASP.NET sites including Data Reports, E-commerce, Portals, and Forums are available now. Download today and enter to win an XBOX or Visual Studio .NET. http://aspnet.click-url.com/go/psa00100006ave/direct;at.asp_061203_01/01 _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
