From mboxrd@z Thu Jan 1 00:00:00 1970 From: ing. Federico Fuga Date: Fri, 16 Nov 2007 11:27:48 +0100 Subject: [Buildroot] Alsa problem with arm 2.6.23.1 and uclibc Message-ID: <473D70A4.3000901@studiofuga.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hi, Do you know of any problem with alsa and uclibc and kernel 2.6.23 on arm? I built a uclibc buildroot, now all works fine except alsa. Aplay can see the devices, but alsactl cannot change the mixer levels: # aplay -l **** List of PLAYBACK Hardware Devices **** card 0: EMX270 [EM-X270], device 0: AC97 HiFi AC97 HiFi-AC97-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: EMX270 [EM-X270], device 1: AC97 Aux AC97 Aux-AC97-1 [] Subdevices: 1/1 Subdevice #0: subdevice #0 # aplay -L default:CARD=EMX270 EM-X270, Default Audio Device null Discard all samples (playback) or generate zero samples (capture) # alsactl restore alsactl: set_control:1159: Cannot write control '2:0:0:Speaker Playback Volume:0' : Inappropriate ioctl for device # alsactl store -f /root/sample alsactl: get_control:218: Cannot read control '2,0,0,Speaker Playback Volume,0': Inappropriate ioctl for device The devices in /dev/snd seems ok: # ls /dev/snd/ -l crw-rw-rw- 1 root root 116, 0 Dec 31 17:00 controlC0 crw-rw-rw- 1 root root 116, 24 Dec 31 17:00 pcmC0D0c crw-rw-rw- 1 root root 116, 16 Dec 31 17:00 pcmC0D0p crw-rw-rw- 1 root root 116, 17 Dec 31 17:00 pcmC0D1p crw-rw-rw- 1 root root 116, 33 Dec 31 17:00 timer The strange thing is that in an Angstrom Linux based on glibc and the same kernel and alsa-lib/utils/libasound version (same patches, same all) it works without problems. last few lines of strace output of alsactl restore : open("/usr/lib/libasound.so.2", O_RDONLY) = 4 fstat(4, {st_mode=S_IFREG|0755, st_size=959649, ...}) = 0 close(4) = 0 open("/dev/snd/controlC0", O_RDONLY) = 4 close(4) = 0 open("/dev/snd/controlC0", O_RDWR) = 4 ioctl(4, USBDEVFS_CONTROL, 0xbef809cc) = 0 ioctl(4, UI_DEV_CREATE, 0xbef80ab0) = 0 ioctl(4, USBDEVFS_CONNECTINFO, 0xbef80634) = 0 ioctl(4, USBDEVFS_HUB_PORTINFO, 0xbef80748) = -1 ENOTTY (Inappropriate ioctl for device) Any idea? Thank you in advance! best regards, ing. Federico Fuga