At Thu, 05 Jun 2014 09:31:25 +0200, Daniel Mack wrote: > > On 05/18/2014 11:43 PM, jem_7@xxxxxx wrote: > > I have a USB audio class 2 device which is an effects processor called > > Fractal Audio Systems Axe-Fx II. It has the ability to work as a midi > > and also as an audio interface (capture and playback). > > > > The device seems to register well, audio and midi functions work. When > > plugged in /var/log/messages shows: > > > > 2014-05-18T22:47:23.372829+02:00 xxx kernel: [10784.638945] usb 2-1.5: > > new high-speed USB device number 19 using ehci-pci > > 2014-05-18T22:47:23.459798+02:00 xxx kernel: [10784.725889] usb 2-1.5: > > New USB device found, idVendor=2466, idProduct=8003 > > 2014-05-18T22:47:23.459809+02:00 xxx kernel: [10784.725893] usb 2-1.5: > > New USB device strings: Mfr=1, Product=2, SerialNumber=0 > > 2014-05-18T22:47:23.459810+02:00 xxx kernel: [10784.725895] usb 2-1.5: > > Product: AXE-FX II > > 2014-05-18T22:47:23.459811+02:00 xxx kernel: [10784.725896] usb 2-1.5: > > Manufacturer: Fractal Audio Systems > > 2014-05-18T22:47:23.468655+02:00 xxx mtp-probe: checking bus 2, device > > 19: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5" > > 2014-05-18T22:47:23.469360+02:00 xxx mtp-probe: bus: 2, device: 19 was > > not an MTP device > > > > When I disconnect the device the following warnings appear in messages: > > > > 2014-05-18T22:49:08.666851+02:00 xxx kernel: [10889.923635] usb 2-1.5: > > USB disconnect, device number 19 > > 2014-05-18T22:49:08.666868+02:00 xxx kernel: [10889.923880] > > ------------[ cut here ]------------ > > 2014-05-18T22:49:08.666870+02:00 xxx kernel: [10889.923890] WARNING: > > CPU: 3 PID: 66 at > > /home/abuild/rpmbuild/BUILD/kernel-desktop-3.14.4/linux-3.14/fs/sysfs/group.c:216 > > device_del+0x40/0x1b0() > > That's odd. I assume this issue goes away if you build the kernel > without OSS emulation support? Try SOUND_OSS=n as a first step. I'm sure that the problem won't happen without OSS. Rather I'm interested in whether this problem is still present on 3.15 kernel. The core device registration/free has been largely rewritten in 3.15. So, please try with 3.15-rc8. thanks, Takashi ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
