Question

Having Problem with Audio I/O when using Headless Firefox

Posted May 9, 2014 4.3k views
Hi I have installed ALSA and Xvfb. I can bring up a headless firefox. I have ALSA driver installed: root@ubuntu-test:~/alsa/alsa-driver-1.0.25# modprobe -l |grep sound kernel/sound/soundcore.ko kernel/sound/core/snd-hrtimer.ko kernel/sound/core/snd-rawmidi.ko kernel/sound/core/seq/snd-seq-dummy.ko kernel/sound/core/seq/snd-seq-virmidi.ko kernel/sound/core/seq/snd-seq-midi.ko kernel/sound/core/seq/snd-seq-midi-emul.ko kernel/sound/drivers/pcsp/snd-pcsp.ko kernel/sound/pci/snd-ens1370.ko What I need to do now is to make some test using a flash / HTML 5 page using Selenium. When I bring up the browser, it is displaying "We couldn't detect a proper audio setup. Please ensure your microphone is working and try again." How do I setup some virtual Audio for I/O so I can continue with the test?
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anne
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4 answers
asb May 9, 2014
ALSA provides a "dummy" driver:

http://www.alsa-project.org/main/index.php/Matrix:Module-dummy

You should be able to enable it with: 


modprobe snd-dummy


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anne May 9, 2014
Hi

I followed the website and got ALSA installed.

snd-dummy is not available, but snd-seq-dummy is there. Is it the same?

What should my next step be?

root@ubuntu-test:~# modprobe -l | grep dummy
kernel/drivers/net/dummy.ko
kernel/sound/core/seq/snd-seq-dummy.ko
root@ubuntu-test:~#

root@ubuntu-test:~# modprobe snd-dummy
FATAL: Module snd_dummy not found.
root@ubuntu-test:~# modprobe -l
kernel/arch/x86/kernel/cpu/mcheck/mce-xeon75xx.ko
kernel/arch/x86/kernel/cpu/mcheck/mce-inject.ko
kernel/arch/x86/kernel/msr.ko
kernel/arch/x86/kernel/cpuid.ko
kernel/arch/x86/kernel/microcode.ko
kernel/arch/x86/crypto/aes-x86_64.ko
kernel/arch/x86/crypto/camellia-x86_64.ko
kernel/arch/x86/crypto/blowfish-x86_64.ko
kernel/arch/x86/crypto/twofish-x86_64.ko
kernel/arch/x86/crypto/twofish-x86_64-3way.ko
kernel/arch/x86/crypto/salsa20-x86_64.ko
kernel/arch/x86/crypto/serpent-sse2-x86_64.ko
kernel/arch/x86/crypto/aesni-intel.ko
kernel/arch/x86/crypto/ghash-clmulni-intel.ko
kernel/arch/x86/crypto/sha1-ssse3.ko
kernel/arch/x86/kvm/kvm.ko
kernel/arch/x86/kvm/kvm-intel.ko
kernel/arch/x86/kvm/kvm-amd.ko
kernel/fs/nfs_common/nfs_acl.ko
kernel/fs/fat/msdos.ko
kernel/fs/nls/nls_iso8859-1.ko
kernel/fs/exofs/libore.ko
kernel/fs/binfmt_misc.ko
kernel/fs/configfs/configfs.ko
kernel/fs/fscache/fscache.ko
kernel/fs/ext2/ext2.ko
kernel/fs/squashfs/squashfs.ko
kernel/fs/isofs/isofs.ko
kernel/fs/nfs/nfs.ko
kernel/fs/nfs/nfs_layout_nfsv41_files.ko
kernel/fs/nfs/objlayout/objlayoutdriver.ko
kernel/fs/nfs/blocklayout/blocklayoutdriver.ko
kernel/fs/nfsd/nfsd.ko
kernel/fs/lockd/lockd.ko
kernel/fs/cifs/cifs.ko
kernel/fs/ufs/ufs.ko
kernel/fs/autofs4/autofs4.ko
kernel/fs/overlayfs/overlayfs.ko
kernel/fs/udf/udf.ko
kernel/fs/xfs/xfs.ko
kernel/fs/9p/9p.ko
kernel/fs/cachefiles/cachefiles.ko
kernel/fs/btrfs/btrfs.ko
kernel/fs/ceph/ceph.ko
kernel/crypto/seqiv.ko
kernel/crypto/crypto_user.ko
kernel/crypto/vmac.ko
kernel/crypto/xcbc.ko
kernel/crypto/crypto_null.ko
kernel/crypto/md4.ko
kernel/crypto/rmd128.ko
kernel/crypto/rmd160.ko
kernel/crypto/rmd256.ko
kernel/crypto/rmd320.ko
kernel/crypto/sha512_generic.ko
kernel/crypto/wp512.ko
kernel/crypto/tgr192.ko
kernel/crypto/gf128mul.ko
kernel/crypto/pcbc.ko
kernel/crypto/cts.ko
kernel/crypto/lrw.ko
kernel/crypto/xts.ko
kernel/crypto/ctr.ko
kernel/crypto/gcm.ko
kernel/crypto/ccm.ko
kernel/crypto/pcrypt.ko
kernel/crypto/cryptd.ko
kernel/crypto/des_generic.ko
kernel/crypto/fcrypt.ko
kernel/crypto/blowfish_generic.ko
kernel/crypto/blowfish_common.ko
kernel/crypto/twofish_generic.ko
kernel/crypto/twofish_common.ko
kernel/crypto/serpent_generic.ko
kernel/crypto/camellia_generic.ko
kernel/crypto/cast5.ko
kernel/crypto/cast6.ko
kernel/crypto/arc4.ko
kernel/crypto/tea.ko
kernel/crypto/khazad.ko
kernel/crypto/anubis.ko
kernel/crypto/seed.ko
kernel/crypto/salsa20_generic.ko
kernel/crypto/deflate.ko
kernel/crypto/zlib.ko
kernel/crypto/michael_mic.ko
kernel/crypto/authenc.ko
kernel/crypto/authencesn.ko
kernel/crypto/ansi_cprng.ko
kernel/crypto/tcrypt.ko
kernel/crypto/ghash-generic.ko
kernel/crypto/af_alg.ko
kernel/crypto/algif_hash.ko
kernel/crypto/algif_skcipher.ko
kernel/crypto/xor.ko
kernel/crypto/async_tx/async_tx.ko
kernel/crypto/async_tx/async_memcpy.ko
kernel/crypto/async_tx/async_xor.ko
kernel/crypto/async_tx/async_pq.ko
kernel/crypto/async_tx/async_raid6_recov.ko
kernel/crypto/async_tx/raid6test.ko
kernel/drivers/pci/hotplug/acpiphp.ko
kernel/drivers/video/vgastate.ko
kernel/drivers/video/sysfillrect.ko
kernel/drivers/video/syscopyarea.ko
kernel/drivers/video/sysimgblt.ko
kernel/drivers/video/fb_sys_fops.ko
kernel/drivers/video/cirrusfb.ko
kernel/drivers/video/xen-fbfront.ko
kernel/drivers/video/vga16fb.ko
kernel/drivers/video/output.ko
kernel/drivers/acpi/apei/einj.ko
kernel/drivers/acpi/apei/erst-dbg.ko
kernel/drivers/acpi/video.ko
kernel/drivers/acpi/pci_slot.ko
kernel/drivers/acpi/acpi_memhotplug.ko
kernel/drivers/acpi/sbshc.ko
kernel/drivers/acpi/sbs.ko
kernel/drivers/acpi/ec_sys.ko
kernel/drivers/acpi/acpi_pad.ko
kernel/drivers/acpi/acpi_ipmi.ko
kernel/drivers/virtio/virtio_balloon.ko
kernel/drivers/xen/xen-evtchn.ko
kernel/drivers/xen/xen-gntdev.ko
kernel/drivers/xen/xen-gntalloc.ko
kernel/drivers/xen/xenfs/xenfs.ko
kernel/drivers/xen/xen-pciback/xen-pciback.ko
kernel/drivers/xen/xen-privcmd.ko
kernel/drivers/char/raw.ko
kernel/drivers/char/lp.ko
kernel/drivers/char/nvram.ko
kernel/drivers/char/ppdev.ko
kernel/drivers/char/ipmi/ipmi_msghandler.ko
kernel/drivers/char/hangcheck-timer.ko
kernel/drivers/block/floppy.ko
kernel/drivers/block/nbd.ko
kernel/drivers/block/cryptoloop.ko
kernel/drivers/block/rbd.ko
kernel/drivers/misc/vmw_balloon.ko
kernel/drivers/scsi/scsi_tgt.ko
kernel/drivers/scsi/raid_class.ko
kernel/drivers/scsi/scsi_transport_fc.ko
kernel/drivers/scsi/scsi_transport_iscsi.ko
kernel/drivers/scsi/scsi_transport_sas.ko
kernel/drivers/scsi/libsas/libsas.ko
kernel/drivers/scsi/device_handler/scsi_dh.ko
kernel/drivers/scsi/libiscsi.ko
kernel/drivers/scsi/libiscsi_tcp.ko
kernel/drivers/scsi/iscsi_tcp.ko
kernel/drivers/scsi/BusLogic.ko
kernel/drivers/scsi/qla1280.ko
kernel/drivers/scsi/vmw_pvscsi.ko
kernel/drivers/scsi/hv_storvsc.ko
kernel/drivers/scsi/osd/libosd.ko
kernel/drivers/scsi/osd/osd.ko
kernel/drivers/scsi/scsi_wait_scan.ko
kernel/drivers/ata/ahci.ko
kernel/drivers/ata/libahci.ko
kernel/drivers/ata/acard-ahci.ko
kernel/drivers/ata/ahci_platform.ko
kernel/drivers/net/ethernet/8390/ne2k-pci.ko
kernel/drivers/net/ethernet/8390/8390.ko
kernel/drivers/net/ethernet/amd/pcnet32.ko
kernel/drivers/net/ethernet/dec/tulip/xircom_cb.ko
kernel/drivers/net/ethernet/dec/tulip/dmfe.ko
kernel/drivers/net/ethernet/dec/tulip/winbond-840.ko
kernel/drivers/net/ethernet/dec/tulip/de2104x.ko
kernel/drivers/net/ethernet/dec/tulip/tulip.ko
kernel/drivers/net/ethernet/dec/tulip/de4x5.ko
kernel/drivers/net/ethernet/dec/tulip/uli526x.ko
kernel/drivers/net/ethernet/intel/e1000/e1000.ko
kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko
kernel/drivers/net/ethernet/intel/igbvf/igbvf.ko
kernel/drivers/net/ethernet/intel/ixgbevf/ixgbevf.ko
kernel/drivers/net/ethernet/realtek/8139cp.ko
kernel/drivers/net/ethernet/realtek/8139too.ko
kernel/drivers/net/ppp/ppp_async.ko
kernel/drivers/net/ppp/bsd_comp.ko
kernel/drivers/net/ppp/ppp_deflate.ko
kernel/drivers/net/ppp/ppp_mppe.ko
kernel/drivers/net/ppp/ppp_synctty.ko
kernel/drivers/net/ppp/pppox.ko
kernel/drivers/net/ppp/pppoe.ko
kernel/drivers/net/ppp/pptp.ko
kernel/drivers/net/slip/slip.ko
kernel/drivers/net/bonding/bonding.ko
kernel/drivers/net/dummy.ko
kernel/drivers/net/eql.ko
kernel/drivers/net/ifb.ko
kernel/drivers/net/macvlan.ko
kernel/drivers/net/macvtap.ko
kernel/drivers/net/netconsole.ko
kernel/drivers/net/veth.ko
kernel/drivers/net/appletalk/ipddp.ko
kernel/drivers/net/vmxnet3/vmxnet3.ko
kernel/drivers/net/xen-netback/xen-netback.ko
kernel/drivers/net/hyperv/hv_netvsc.ko
kernel/drivers/message/fusion/mptbase.ko
kernel/drivers/message/fusion/mptscsih.ko
kernel/drivers/message/fusion/mptspi.ko
kernel/drivers/message/fusion/mptfc.ko
kernel/drivers/message/fusion/mptsas.ko
kernel/drivers/message/fusion/mptctl.ko
kernel/drivers/message/fusion/mptlan.ko
kernel/drivers/usb/storage/usb-storage.ko
kernel/drivers/input/serio/serport.ko
kernel/drivers/input/serio/serio_raw.ko
kernel/drivers/input/mouse/psmouse.ko
kernel/drivers/input/touchscreen/usbtouchscreen.ko
kernel/drivers/input/misc/xen-kbdfront.ko
kernel/drivers/input/joydev.ko
kernel/drivers/input/evbug.ko
kernel/drivers/watchdog/softdog.ko
kernel/drivers/md/linear.ko
kernel/drivers/md/raid0.ko
kernel/drivers/md/raid1.ko
kernel/drivers/md/raid10.ko
kernel/drivers/md/raid456.ko
kernel/drivers/md/multipath.ko
kernel/drivers/md/faulty.ko
kernel/drivers/md/dm-bufio.ko
kernel/drivers/md/dm-crypt.ko
kernel/drivers/md/dm-multipath.ko
kernel/drivers/md/dm-round-robin.ko
kernel/drivers/md/dm-queue-length.ko
kernel/drivers/md/dm-service-time.ko
kernel/drivers/md/dm-snapshot.ko
kernel/drivers/md/persistent-data/dm-persistent-data.ko
kernel/drivers/md/dm-mirror.ko
kernel/drivers/md/dm-log.ko
kernel/drivers/md/dm-region-hash.ko
kernel/drivers/md/dm-zero.ko
kernel/drivers/md/dm-raid.ko
kernel/drivers/md/dm-thin-pool.ko
kernel/drivers/parport/parport.ko
kernel/drivers/parport/parport_pc.ko
kernel/drivers/input/gameport/gameport.ko
kernel/drivers/infiniband/core/ib_core.ko
kernel/drivers/infiniband/core/ib_mad.ko
kernel/drivers/infiniband/core/ib_sa.ko
kernel/drivers/infiniband/core/ib_cm.ko
kernel/drivers/infiniband/core/iw_cm.ko
kernel/drivers/infiniband/core/ib_addr.ko
kernel/drivers/infiniband/core/rdma_cm.ko
kernel/drivers/hv/hv_vmbus.ko
kernel/drivers/hv/hv_utils.ko
kernel/sound/soundcore.ko
kernel/sound/core/snd-hrtimer.ko
kernel/sound/core/snd-rawmidi.ko
kernel/sound/core/seq/snd-seq-dummy.ko
kernel/sound/core/seq/snd-seq-virmidi.ko
kernel/sound/core/seq/snd-seq-midi.ko
kernel/sound/core/seq/snd-seq-midi-emul.ko
kernel/sound/drivers/pcsp/snd-pcsp.ko
kernel/sound/pci/snd-ens1370.ko
kernel/arch/x86/oprofile/oprofile.ko
kernel/net/core/pktgen.ko
kernel/net/core/netprio_cgroup.ko
kernel/net/802/p8022.ko
kernel/net/802/psnap.ko
kernel/net/802/p8023.ko
kernel/net/802/stp.ko
kernel/net/802/garp.ko
kernel/net/sched/act_police.ko
kernel/net/sched/act_gact.ko
kernel/net/sched/act_mirred.ko
kernel/net/sched/act_ipt.ko
kernel/net/sched/act_nat.ko
kernel/net/sched/act_pedit.ko
kernel/net/sched/act_simple.ko
kernel/net/sched/act_skbedit.ko
kernel/net/sched/act_csum.ko
kernel/net/sched/sch_cbq.ko
kernel/net/sched/sch_htb.ko
kernel/net/sched/sch_hfsc.ko
kernel/net/sched/sch_red.ko
kernel/net/sched/sch_gred.ko
kernel/net/sched/sch_ingress.ko
kernel/net/sched/sch_dsmark.ko
kernel/net/sched/sch_sfb.ko
kernel/net/sched/sch_sfq.ko
kernel/net/sched/sch_tbf.ko
kernel/net/sched/sch_teql.ko
kernel/net/sched/sch_prio.ko
kernel/net/sched/sch_multiq.ko
kernel/net/sched/sch_atm.ko
kernel/net/sched/sch_netem.ko
kernel/net/sched/sch_drr.ko
kernel/net/sched/sch_plug.ko
kernel/net/sched/sch_mqprio.ko
kernel/net/sched/sch_choke.ko
kernel/net/sched/sch_qfq.ko
kernel/net/sched/sch_codel.ko
kernel/net/sched/sch_fq_codel.ko
kernel/net/sched/cls_u32.ko
kernel/net/sched/cls_route.ko
kernel/net/sched/cls_fw.ko
kernel/net/sched/cls_rsvp.ko
kernel/net/sched/cls_tcindex.ko
kernel/net/sched/cls_rsvp6.ko
kernel/net/sched/cls_basic.ko
kernel/net/sched/cls_flow.ko
kernel/net/sched/cls_cgroup.ko
kernel/net/sched/em_cmp.ko
kernel/net/sched/em_nbyte.ko
kernel/net/sched/em_u32.ko
kernel/net/sched/em_meta.ko
kernel/net/sched/em_text.ko
kernel/net/netfilter/nfnetlink.ko
kernel/net/netfilter/nfnetlink_acct.ko
kernel/net/netfilter/nfnetlink_queue.ko
kernel/net/netfilter/nfnetlink_log.ko
kernel/net/netfilter/nf_conntrack.ko
kernel/net/netfilter/nf_conntrack_proto_dccp.ko
kernel/net/netfilter/nf_conntrack_proto_gre.ko
kernel/net/netfilter/nf_conntrack_proto_sctp.ko
kernel/net/netfilter/nf_conntrack_proto_udplite.ko
kernel/net/netfilter/nf_conntrack_netlink.ko
kernel/net/netfilter/nfnetlink_cttimeout.ko
kernel/net/netfilter/nf_conntrack_amanda.ko
kernel/net/netfilter/nf_conntrack_ftp.ko
kernel/net/netfilter/nf_conntrack_h323.ko
kernel/net/netfilter/nf_conntrack_irc.ko
kernel/net/netfilter/nf_conntrack_broadcast.ko
kernel/net/netfilter/nf_conntrack_netbios_ns.ko
kernel/net/netfilter/nf_conntrack_snmp.ko
kernel/net/netfilter/nf_conntrack_pptp.ko
kernel/net/netfilter/nf_conntrack_sane.ko
kernel/net/netfilter/nf_conntrack_sip.ko
kernel/net/netfilter/nf_conntrack_tftp.ko
kernel/net/netfilter/nf_tproxy_core.ko
kernel/net/netfilter/x_tables.ko
kernel/net/netfilter/xt_tcpudp.ko
kernel/net/netfilter/xt_mark.ko
kernel/net/netfilter/xt_connmark.ko
kernel/net/netfilter/xt_set.ko
kernel/net/netfilter/xt_AUDIT.ko
kernel/net/netfilter/xt_CHECKSUM.ko
kernel/net/netfilter/xt_CLASSIFY.ko
kernel/net/netfilter/xt_CONNSECMARK.ko
kernel/net/netfilter/xt_CT.ko
kernel/net/netfilter/xt_DSCP.ko
kernel/net/netfilter/xt_HL.ko
kernel/net/netfilter/xt_HMARK.ko
kernel/net/netfilter/xt_LED.ko
kernel/net/netfilter/xt_LOG.ko
kernel/net/netfilter/xt_NFLOG.ko
kernel/net/netfilter/xt_NFQUEUE.ko
kernel/net/netfilter/xt_NOTRACK.ko
kernel/net/netfilter/xt_RATEEST.ko
kernel/net/netfilter/xt_SECMARK.ko
kernel/net/netfilter/xt_TPROXY.ko
kernel/net/netfilter/xt_TCPMSS.ko
kernel/net/netfilter/xt_TCPOPTSTRIP.ko
kernel/net/netfilter/xt_TEE.ko
kernel/net/netfilter/xt_TRACE.ko
kernel/net/netfilter/xt_IDLETIMER.ko
kernel/net/netfilter/xt_addrtype.ko
kernel/net/netfilter/xt_cluster.ko
kernel/net/netfilter/xt_comment.ko
kernel/net/netfilter/xt_connbytes.ko
kernel/net/netfilter/xt_connlimit.ko
kernel/net/netfilter/xt_conntrack.ko
kernel/net/netfilter/xt_cpu.ko
kernel/net/netfilter/xt_dccp.ko
kernel/net/netfilter/xt_devgroup.ko
kernel/net/netfilter/xt_dscp.ko
kernel/net/netfilter/xt_ecn.ko
kernel/net/netfilter/xt_esp.ko
kernel/net/netfilter/xt_hashlimit.ko
kernel/net/netfilter/xt_helper.ko
kernel/net/netfilter/xt_hl.ko
kernel/net/netfilter/xt_iprange.ko
kernel/net/netfilter/xt_ipvs.ko
kernel/net/netfilter/xt_length.ko
kernel/net/netfilter/xt_limit.ko
kernel/net/netfilter/xt_mac.ko
kernel/net/netfilter/xt_multiport.ko
kernel/net/netfilter/xt_nfacct.ko
kernel/net/netfilter/xt_osf.ko
kernel/net/netfilter/xt_owner.ko
kernel/net/netfilter/xt_physdev.ko
kernel/net/netfilter/xt_pkttype.ko
kernel/net/netfilter/xt_policy.ko
kernel/net/netfilter/xt_quota.ko
kernel/net/netfilter/xt_rateest.ko
kernel/net/netfilter/xt_realm.ko
kernel/net/netfilter/xt_recent.ko
kernel/net/netfilter/xt_sctp.ko
kernel/net/netfilter/xt_socket.ko
kernel/net/netfilter/xt_state.ko
kernel/net/netfilter/xt_statistic.ko
kernel/net/netfilter/xt_string.ko
kernel/net/netfilter/xt_tcpmss.ko
kernel/net/netfilter/xt_time.ko
kernel/net/netfilter/xt_u32.ko
kernel/net/netfilter/ipset/ip_set.ko
kernel/net/netfilter/ipset/ip_set_bitmap_ip.ko
kernel/net/netfilter/ipset/ip_set_bitmap_ipmac.ko
kernel/net/netfilter/ipset/ip_set_bitmap_port.ko
kernel/net/netfilter/ipset/ip_set_hash_ip.ko
kernel/net/netfilter/ipset/ip_set_hash_ipport.ko
kernel/net/netfilter/ipset/ip_set_hash_ipportip.ko
kernel/net/netfilter/ipset/ip_set_hash_ipportnet.ko
kernel/net/netfilter/ipset/ip_set_hash_net.ko
kernel/net/netfilter/ipset/ip_set_hash_netport.ko
kernel/net/netfilter/ipset/ip_set_hash_netiface.ko
kernel/net/netfilter/ipset/ip_set_list_set.ko
kernel/net/netfilter/ipvs/ip_vs.ko
kernel/net/netfilter/ipvs/ip_vs_rr.ko
kernel/net/netfilter/ipvs/ip_vs_wrr.ko
kernel/net/netfilter/ipvs/ip_vs_lc.ko
kernel/net/netfilter/ipvs/ip_vs_wlc.ko
kernel/net/netfilter/ipvs/ip_vs_lblc.ko
kernel/net/netfilter/ipvs/ip_vs_lblcr.ko
kernel/net/netfilter/ipvs/ip_vs_dh.ko
kernel/net/netfilter/ipvs/ip_vs_sh.ko
kernel/net/netfilter/ipvs/ip_vs_sed.ko
kernel/net/netfilter/ipvs/ip_vs_nq.ko
kernel/net/netfilter/ipvs/ip_vs_ftp.ko
kernel/net/netfilter/ipvs/ip_vs_pe_sip.ko
kernel/net/ipv4/netfilter/nf_conntrack_ipv4.ko
kernel/net/ipv4/netfilter/nf_nat.ko
kernel/net/ipv4/netfilter/nf_defrag_ipv4.ko
kernel/net/ipv4/netfilter/nf_nat_amanda.ko
kernel/net/ipv4/netfilter/nf_nat_ftp.ko
kernel/net/ipv4/netfilter/nf_nat_h323.ko
kernel/net/ipv4/netfilter/nf_nat_irc.ko
kernel/net/ipv4/netfilter/nf_nat_pptp.ko
kernel/net/ipv4/netfilter/nf_nat_sip.ko
kernel/net/ipv4/netfilter/nf_nat_snmp_basic.ko
kernel/net/ipv4/netfilter/nf_nat_tftp.ko
kernel/net/ipv4/netfilter/nf_nat_proto_dccp.ko
kernel/net/ipv4/netfilter/nf_nat_proto_gre.ko
kernel/net/ipv4/netfilter/nf_nat_proto_udplite.ko
kernel/net/ipv4/netfilter/nf_nat_proto_sctp.ko
kernel/net/ipv4/netfilter/ip_tables.ko
kernel/net/ipv4/netfilter/iptable_filter.ko
kernel/net/ipv4/netfilter/iptable_mangle.ko
kernel/net/ipv4/netfilter/iptable_nat.ko
kernel/net/ipv4/netfilter/iptable_raw.ko
kernel/net/ipv4/netfilter/iptable_security.ko
kernel/net/ipv4/netfilter/ipt_ah.ko
kernel/net/ipv4/netfilter/ipt_rpfilter.ko
kernel/net/ipv4/netfilter/ipt_CLUSTERIP.ko
kernel/net/ipv4/netfilter/ipt_ECN.ko
kernel/net/ipv4/netfilter/ipt_MASQUERADE.ko
kernel/net/ipv4/netfilter/ipt_NETMAP.ko
kernel/net/ipv4/netfilter/ipt_REDIRECT.ko
kernel/net/ipv4/netfilter/ipt_REJECT.ko
kernel/net/ipv4/netfilter/ipt_ULOG.ko
kernel/net/ipv4/netfilter/arp_tables.ko
kernel/net/ipv4/netfilter/arpt_mangle.ko
kernel/net/ipv4/netfilter/arptable_filter.ko
kernel/net/ipv4/ipip.ko
kernel/net/ipv4/gre.ko
kernel/net/ipv4/ip_gre.ko
kernel/net/ipv4/ah4.ko
kernel/net/ipv4/esp4.ko
kernel/net/ipv4/ipcomp.ko
kernel/net/ipv4/xfrm4_tunnel.ko
kernel/net/ipv4/xfrm4_mode_beet.ko
kernel/net/ipv4/tunnel4.ko
kernel/net/ipv4/xfrm4_mode_transport.ko
kernel/net/ipv4/xfrm4_mode_tunnel.ko
kernel/net/ipv4/inet_diag.ko
kernel/net/ipv4/tcp_diag.ko
kernel/net/ipv4/udp_diag.ko
kernel/net/ipv4/tcp_probe.ko
kernel/net/ipv4/tcp_bic.ko
kernel/net/ipv4/tcp_westwood.ko
kernel/net/ipv4/tcp_highspeed.ko
kernel/net/ipv4/tcp_hybla.ko
kernel/net/ipv4/tcp_htcp.ko
kernel/net/ipv4/tcp_vegas.ko
kernel/net/ipv4/tcp_veno.ko
kernel/net/ipv4/tcp_scalable.ko
kernel/net/ipv4/tcp_lp.ko
kernel/net/ipv4/tcp_yeah.ko
kernel/net/ipv4/tcp_illinois.ko
kernel/net/xfrm/xfrm_algo.ko
kernel/net/xfrm/xfrm_user.ko
kernel/net/xfrm/xfrm_ipcomp.ko
kernel/net/ipv6/netfilter/ip6_tables.ko
kernel/net/ipv6/netfilter/ip6table_filter.ko
kernel/net/ipv6/netfilter/ip6table_mangle.ko
kernel/net/ipv6/netfilter/ip6table_raw.ko
kernel/net/ipv6/netfilter/ip6table_security.ko
kernel/net/ipv6/netfilter/nf_conntrack_ipv6.ko
kernel/net/ipv6/netfilter/nf_defrag_ipv6.ko
kernel/net/ipv6/netfilter/ip6t_ah.ko
kernel/net/ipv6/netfilter/ip6t_eui64.ko
kernel/net/ipv6/netfilter/ip6t_frag.ko
kernel/net/ipv6/netfilter/ip6t_ipv6header.ko
kernel/net/ipv6/netfilter/ip6t_mh.ko
kernel/net/ipv6/netfilter/ip6t_hbh.ko
kernel/net/ipv6/netfilter/ip6t_rpfilter.ko
kernel/net/ipv6/netfilter/ip6t_rt.ko
kernel/net/ipv6/netfilter/ip6t_REJECT.ko
kernel/net/ipv6/ah6.ko
kernel/net/ipv6/esp6.ko
kernel/net/ipv6/ipcomp6.ko
kernel/net/ipv6/xfrm6_tunnel.ko
kernel/net/ipv6/tunnel6.ko
kernel/net/ipv6/xfrm6_mode_transport.ko
kernel/net/ipv6/xfrm6_mode_tunnel.ko
kernel/net/ipv6/xfrm6_mode_ro.ko
kernel/net/ipv6/xfrm6_mode_beet.ko
kernel/net/ipv6/mip6.ko
kernel/net/ipv6/sit.ko
kernel/net/ipv6/ip6_tunnel.ko
kernel/net/8021q/8021q.ko
kernel/net/llc/llc.ko
kernel/net/llc/llc2.ko
kernel/net/key/af_key.ko
kernel/net/bridge/bridge.ko
kernel/net/bridge/netfilter/ebtables.ko
kernel/net/bridge/netfilter/ebtable_broute.ko
kernel/net/bridge/netfilter/ebtable_filter.ko
kernel/net/bridge/netfilter/ebtable_nat.ko
kernel/net/bridge/netfilter/ebt_802_3.ko
kernel/net/bridge/netfilter/ebt_among.ko
kernel/net/bridge/netfilter/ebt_arp.ko
kernel/net/bridge/netfilter/ebt_ip.ko
kernel/net/bridge/netfilter/ebt_ip6.ko
kernel/net/bridge/netfilter/ebt_limit.ko
kernel/net/bridge/netfilter/ebt_mark_m.ko
kernel/net/bridge/netfilter/ebt_pkttype.ko
kernel/net/bridge/netfilter/ebt_stp.ko
kernel/net/bridge/netfilter/ebt_vlan.ko
kernel/net/bridge/netfilter/ebt_arpreply.ko
kernel/net/bridge/netfilter/ebt_mark.ko
kernel/net/bridge/netfilter/ebt_dnat.ko
kernel/net/bridge/netfilter/ebt_redirect.ko
kernel/net/bridge/netfilter/ebt_snat.ko
kernel/net/bridge/netfilter/ebt_log.ko
kernel/net/bridge/netfilter/ebt_nflog.ko
kernel/net/ipx/ipx.ko
kernel/net/appletalk/appletalk.ko
kernel/net/wanrouter/wanrouter.ko
kernel/net/x25/x25.ko
kernel/net/lapb/lapb.ko
kernel/net/netrom/netrom.ko
kernel/net/rose/rose.ko
kernel/net/ax25/ax25.ko
kernel/net/can/can.ko
kernel/net/can/can-raw.ko
kernel/net/can/can-bcm.ko
kernel/net/can/can-gw.ko
kernel/net/irda/irda.ko
kernel/net/irda/irlan/irlan.ko
kernel/net/irda/irnet/irnet.ko
kernel/net/irda/ircomm/ircomm.ko
kernel/net/irda/ircomm/ircomm-tty.ko
kernel/net/sunrpc/sunrpc.ko
kernel/net/sunrpc/auth_gss/auth_rpcgss.ko
kernel/net/rxrpc/af-rxrpc.ko
kernel/net/rxrpc/rxkad.ko
kernel/net/atm/atm.ko
kernel/net/atm/clip.ko
kernel/net/atm/br2684.ko
kernel/net/atm/lec.ko
kernel/net/atm/mpoa.ko
kernel/net/atm/pppoatm.ko
kernel/net/decnet/netfilter/dn_rtmsg.ko
kernel/net/decnet/decnet.ko
kernel/net/phonet/phonet.ko
kernel/net/phonet/pn_pep.ko
kernel/net/dccp/dccp.ko
kernel/net/dccp/dccp_ipv4.ko
kernel/net/dccp/dccp_ipv6.ko
kernel/net/dccp/dccp_diag.ko
kernel/net/dccp/dccp_probe.ko
kernel/net/sctp/sctp.ko
kernel/net/sctp/sctp_probe.ko
kernel/net/tipc/tipc.ko
kernel/net/9p/9pnet.ko
kernel/net/9p/9pnet_virtio.ko
kernel/net/9p/9pnet_rdma.ko
kernel/net/ieee802154/ieee802154.ko
kernel/net/ieee802154/af_802154.ko
kernel/net/ieee802154/6lowpan.ko
kernel/net/ceph/libceph.ko
kernel/lib/xz/xz_dec_test.ko
kernel/lib/test-kstrtox.ko
kernel/lib/crc-ccitt.ko
kernel/lib/crc-itu-t.ko
kernel/lib/crc7.ko
kernel/lib/libcrc32c.ko
kernel/lib/crc8.ko
kernel/lib/zlib_deflate/zlib_deflate.ko
kernel/lib/reed_solomon/reed_solomon.ko
kernel/lib/bch.ko
kernel/lib/raid6/raid6_pq.ko
kernel/lib/ts_kmp.ko
kernel/lib/ts_bm.ko
kernel/lib/ts_fsm.ko
kernel/lib/cpu-notifier-error-inject.ko
kernel/lib/lru_cache.ko
kernel/lib/cordic.ko
updates/acore/seq/oss/snd-seq-oss.ko
updates/acore/oss/snd-pcm-oss.ko
updates/pci/hda/snd-hda-codec-atihdmi.ko
updates/pci/hda/snd-hda-codec-nvhdmi.ko
updates/pci/hda/snd-hda-codec-cmedia.ko
updates/pci/hda/snd-hda-codec-intelhdmi.ko
updates/pci/hda/snd-hda-codec-cirrus.ko
updates/pci/hda/snd-hda-codec.ko
updates/pci/hda/snd-hda-codec-analog.ko
updates/pci/hda/snd-hda-intel.ko
updates/pci/hda/snd-hda-codec-ca0110.ko
updates/pci/hda/snd-hda-codec-idt.ko
updates/pci/hda/snd-hda-codec-ca0132.ko
updates/pci/hda/snd-hda-codec-via.ko
updates/pci/hda/snd-hda-codec-conexant.ko
updates/pci/hda/snd-hda-codec-si3054.ko
updates/pci/hda/snd-hda-codec-hdmi.ko
updates/pci/hda/snd-hda-codec-realtek.ko
updates/acore/seq/snd-seq.ko
updates/acore/seq/snd-seq-midi-event.ko
updates/acore/seq/snd-seq-device.ko
updates/acore/snd-page-alloc.ko
updates/acore/snd-hwdep.ko
updates/acore/snd-timer.ko
updates/acore/oss/snd-mixer-oss.ko
updates/acore/snd-pcm.ko
updates/acore/snd.ko
initrd/vesafb.ko
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anne May 9, 2014
I am getting
root@ubuntu-test:~# modprobe snd-seq-dummy
FATAL: Error inserting snd_seq_dummy (/lib/modules/3.5.0-48-generic/kernel/sound/core/seq/snd-seq-dummy.ko): Invalid argument
root@ubuntu-test:~#

How do I fix this?
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asb May 9, 2014
What version of Ubuntu are you running? How did you install ALSA?

On Ubuntu 14.04, after installing the package "alsa-base" I have it available. 


# lsmod

Module                  Size  Used by

snd_dummy              20483  0 

snd_pcm               102099  1 snd_dummy

snd_page_alloc         18710  1 snd_pcm

snd_timer              29482  1 snd_pcm

snd                    69238  3 snd_dummy,snd_timer,snd_pcm

soundcore              12680  1 snd

ppdev                  17671  0 

kvm_intel             143060  0 

vmwgfx                175358  0 

kvm                   451511  1 kvm_intel

ttm                    85115  1 vmwgfx

psmouse               102222  0 

serio_raw              13462  0 

drm                   302817  2 ttm,vmwgfx

i2c_piix4              22155  0 

parport_pc             32701  1 

lp                     17759  0 

mac_hid                13205  0 

parport                42348  3 lp,ppdev,parport_pc

floppy                 69370  0
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