Hello, Sorry I'm not able to test this more quickly - my free time has all but dried up these days!
But I've just tried the latest kernel, 4.3 rc4, and saw no change. Here's the trace from the kernel that shows up in the syslog when I plug the device in: Oct 7 15:16:43 scaph kernel: [ 93.329270] usb 3-1.2: new full-speed USB device number 9 using ehci-pci Oct 7 15:16:43 scaph kernel: [ 93.422645] usb 3-1.2: New USB device found, idVendor=1604, idProduct=8007 Oct 7 15:16:43 scaph kernel: [ 93.422652] usb 3-1.2: New USB device strings: Mfr=0, Product=0, SerialNumber=0 Oct 7 15:16:43 scaph mtp-probe: checking bus 3, device 9: "/sys/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2" Oct 7 15:16:43 scaph mtp-probe: bus: 3, device: 9 was not an MTP device Oct 7 15:16:43 scaph /lib/udev/tascam_fpga: calling /usr/bin/usx2yloader for Oct 7 15:16:45 scaph /lib/udev/tascam_fpga: leaving Oct 7 15:16:46 scaph systemd-udevd[2016]: Process '/usr/sbin/alsactl -E HOME=/var/run/alsa restore 1' failed with exit code 99. Oct 7 15:16:46 scaph kernel: [ 96.656497] ------------[ cut here ]------------ Oct 7 15:16:46 scaph kernel: [ 96.656507] WARNING: CPU: 0 PID: 0 at include/linux/kref.h:47 usb_get_urb+0x40/0x50 [usbcore]() Oct 7 15:16:46 scaph kernel: [ 96.656508] Modules linked in: snd_seq_midi snd_seq_midi_event snd_usb_usx2y snd_usbmidi_lib snd_rawmidi sha256_generic hmac drbg ansi_cprng ctr ccm binfmt_misc snd_hrtimer snd_seq snd_seq_device bnep joydev nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hd a_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm arc4 crc32_pclmul aesni_intel aes_i586 xts lrw gf128mul ablk_helper cryptd iwldvm evdev psmouse serio_raw mac80211 i2c_i801 uvcvideo videobuf2_vmalloc videobuf2_memops iwlwifi videobuf2_core btusb v4l2_common btrtl btbcm btintel bluetooth videodev snd_hda_intel cfg80211 snd_hda_codec snd_hda_core m edia snd_hwdep snd_pcm lpc_ich sg mfd_core snd_timer shpchp i915 thinkpad_acpi wmi nvram snd soundcore tpm_tis rfkill battery drm_kms_helper ac tpm drm i2c_algo_bit video button processor loop parport_pc ppdev lp parport autofs4 ext4 crc16 mbcache jbd2 sd_mod crc32c_intel ahci libahci libata scsi_mod sdhci_pci sdhci mmc_core ehci_pci ehci_hcd xhci_pci e1000e xhci_hcd ptp pps_core usb core usb_common thermal Oct 7 15:16:46 scaph kernel: [ 96.656572] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.3.0-rc4+ #3 Oct 7 15:16:46 scaph kernel: [ 96.656573] Hardware name: LENOVO 23252UF/23252UF, BIOS G2ET85WW (2.05 ) 10/22/2012 Oct 7 15:16:46 scaph kernel: [ 96.656575] f82dbc1a f742fe24 c12949c5 00000000 c106367d c15e79a4 00000000 00000000 Oct 7 15:16:46 scaph kernel: [ 96.656578] f82dbc1a 0000002f f82c7300 00000009 f82c7300 f68b4300 f0de4400 00000020 Oct 7 15:16:46 scaph kernel: [ 96.656581] f742fe34 c1063752 00000009 00000000 f742fe40 f82c7300 f68b4300 f742ff00 Oct 7 15:16:46 scaph kernel: [ 96.656584] Call Trace: Oct 7 15:16:46 scaph kernel: [ 96.656590] [<c12949c5>] ? dump_stack+0x3e/0x59 Oct 7 15:16:46 scaph kernel: [ 96.656593] [<c106367d>] ? warn_slowpath_common+0x8d/0xc0 Oct 7 15:16:46 scaph kernel: [ 96.656597] [<f82c7300>] ? usb_get_urb+0x40/0x50 [usbcore] Oct 7 15:16:46 scaph kernel: [ 96.656599] [<f82c7300>] ? usb_get_urb+0x40/0x50 [usbcore] Oct 7 15:16:46 scaph kernel: [ 96.656601] [<c1063752>] ? warn_slowpath_null+0x22/0x30 Oct 7 15:16:46 scaph kernel: [ 96.656604] [<f82c7300>] ? usb_get_urb+0x40/0x50 [usbcore] Oct 7 15:16:46 scaph kernel: [ 96.656608] [<f82c529a>] ? usb_hcd_submit_urb+0x3a/0x9b0 [usbcore] Oct 7 15:16:46 scaph kernel: [ 96.656612] [<c12a7fc7>] ? find_next_bit+0x17/0x30 Oct 7 15:16:46 scaph kernel: [ 96.656614] [<c1294818>] ? cpumask_next_and+0x28/0x40 Oct 7 15:16:46 scaph kernel: [ 96.656617] [<c10958ab>] ? load_balance+0xeb/0x860 Oct 7 15:16:46 scaph kernel: [ 96.656620] [<f892ebe8>] ? usX2Y_urb_submit.isra.3+0x38/0x70 [snd_usb_usx2y] Oct 7 15:16:46 scaph kernel: [ 96.656624] [<c1084288>] ? update_rq_clock.part.77+0x18/0x50 Oct 7 15:16:46 scaph kernel: [ 96.656626] [<f892ede8>] ? i_usX2Y_urb_complete+0x168/0x540 [snd_usb_usx2y] Oct 7 15:16:46 scaph kernel: [ 96.656629] [<c13f0f9b>] ? led_trigger_blink_setup+0x2b/0xa0 Oct 7 15:16:46 scaph kernel: [ 96.656633] [<f82c3be3>] ? __usb_hcd_giveback_urb+0x73/0x130 [usbcore] Oct 7 15:16:46 scaph kernel: [ 96.656636] [<f82c449c>] ? usb_giveback_urb_bh+0x7c/0xc0 [usbcore] Oct 7 15:16:46 scaph kernel: [ 96.656639] [<c1067358>] ? tasklet_hi_action+0xc8/0xe0 Oct 7 15:16:46 scaph kernel: [ 96.656641] [<c1067957>] ? __do_softirq+0xd7/0x230 Oct 7 15:16:46 scaph kernel: [ 96.656643] [<c1067880>] ? cpu_callback+0x190/0x190 Oct 7 15:16:46 scaph kernel: [ 96.656647] [<c1013fa8>] ? do_softirq_own_stack+0x28/0x30 Oct 7 15:16:46 scaph kernel: [ 96.656648] <IRQ> [<c1067c25>] ? irq_exit+0xa5/0xb0 Oct 7 15:16:46 scaph kernel: [ 96.656652] [<c150beb5>] ? do_IRQ+0x45/0xc0 Oct 7 15:16:46 scaph kernel: [ 96.656654] [<c1096084>] ? pick_next_task_fair+0x64/0x490 Oct 7 15:16:46 scaph kernel: [ 96.656657] [<c10c7b9a>] ? ktime_get+0x4a/0x120 Oct 7 15:16:46 scaph kernel: [ 96.656661] [<c150b333>] ? common_interrupt+0x33/0x38 Oct 7 15:16:46 scaph kernel: [ 96.656664] [<c13edcaf>] ? cpuidle_enter_state+0x13f/0x2e0 Oct 7 15:16:46 scaph kernel: [ 96.656667] [<c109c39a>] ? cpu_startup_entry+0x23a/0x2f0 Oct 7 15:16:46 scaph kernel: [ 96.656669] [<c171db05>] ? start_kernel+0x3b3/0x3ba Oct 7 15:16:46 scaph kernel: [ 96.656670] ---[ end trace 7dbf5e0bc21ce091 ]--- Oct 7 15:16:48 scaph kernel: [ 99.124075] should not be here with counts=0 Oct 7 15:16:49 scaph kernel: [ 99.278993] usb 3-1.2: USB disconnect, device number 9 Oct 7 15:16:49 scaph pulseaudio[1492]: [alsa-sink-US-X2Y Audio] alsa-util.c: Got POLLNVAL from ALSA Oct 7 15:16:49 scaph pulseaudio[1492]: [alsa-source-US-X2Y Audio] alsa-util.c: Got POLLNVAL from ALSA Oct 7 15:16:49 scaph pulseaudio[1492]: [alsa-sink-US-X2Y Audio] alsa-util.c: Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare(): No such device Oct 7 15:16:49 scaph pulseaudio[1492]: [alsa-source-US-X2Y Audio] alsa-util.c: Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare(): No such device ..... and then a few minutes later, this happened, and my whole system froze solid, requiring a hard reset: Oct 7 15:20:01 scaph kernel: [ 292.005150] BUG: unable to handle kernel paging request at 000b0000 Oct 7 15:20:01 scaph kernel: [ 292.005236] IP: [<c114a6b9>] put_page+0x9/0x40 Oct 7 15:20:01 scaph kernel: [ 292.005293] *pdpt = 00000000301e5001 *pde = 0000000000000000 Oct 7 15:20:01 scaph kernel: [ 292.005360] Oops: 0000 [#1] SMP Oct 7 15:20:01 scaph kernel: [ 292.005402] Modules linked in: snd_seq_midi snd_seq_midi_event snd_usb_usx2y snd_usbmidi_lib snd_rawmidi sha256_generic hmac drbg ansi_cprng ctr ccm binfmt_misc snd_hrtimer snd_seq snd_seq_device bnep joydev nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hd a_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm arc4 crc32_pclmul aesni_intel aes_i586 xts lrw gf128mul ablk_helper cryptd iwldvm evdev psmouse serio_raw mac80211 i2c_i801 uvcvideo videobuf2_vmalloc videobuf2_memops iwlwifi videobuf2_core btusb v4l2_common btrtl btbcm btintel bluetooth videodev snd_hda_intel cfg80211 snd_hda_codec snd_hda_core m edia snd_hwdep snd_pcm lpc_ich sg mfd_core snd_timer shpchp i915 thinkpad_acpi wmi nvram snd soundcore tpm_tis rfkill battery drm_kms_helper ac tpm drm i2c_algo_bit video button processor loop parport_pc ppdev lp parport autofs4 ext4 crc16 mbcache jbd2 sd_mod crc32c_intel ahci libahci libata scsi_mod sdhci_pci sdhci mmc_core ehci_pci ehci_hcd xhci_pci e1000e xhci_hcd ptp pps_core usb core usb_common thermal Oct 7 15:20:01 scaph kernel: [ 292.006778] CPU: 0 PID: 1196 Comm: Xorg Tainted: G W 4.3.0-rc4+ #3 Oct 7 15:20:01 scaph kernel: [ 292.006853] Hardware name: LENOVO 23252UF/23252UF, BIOS G2ET85WW (2.05 ) 10/22/2012 Oct 7 15:20:01 scaph kernel: [ 292.006931] task: eec0f440 ti: f0274000 task.ti: f0274000 Oct 7 15:20:01 scaph kernel: [ 292.006988] EIP: 0060:[<c114a6b9>] EFLAGS: 00013202 CPU: 0 Oct 7 15:20:01 scaph kernel: [ 292.007045] EIP is at put_page+0x9/0x40 Oct 7 15:20:01 scaph kernel: [ 292.007085] EAX: 000b0000 EBX: eefc2080 ECX: 00000000 EDX: 03ac8800 Oct 7 15:20:01 scaph kernel: [ 292.007148] ESI: 000b0000 EDI: f8c1b028 EBP: f0275da4 ESP: f0275da0 Oct 7 15:20:01 scaph kernel: [ 292.007210] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 Oct 7 15:20:01 scaph kernel: [ 292.007265] CR0: 80050033 CR2: 000b0000 CR3: 30144140 CR4: 001406f0 Oct 7 15:20:01 scaph kernel: [ 292.007328] Stack: Oct 7 15:20:01 scaph kernel: [ 292.007351] eefc2080 f0275dd0 f8b9c690 00000000 c12b0088 e8ca7c40 f68b4300 00000000 Oct 7 15:20:01 scaph kernel: [ 292.007453] 00000004 00000001 00000000 eefc2080 f0275de4 f8b9a6ed eefc2080 eefc2084 Oct 7 15:20:01 scaph kernel: [ 292.007554] eefcd240 f0275e10 f8b9d77a f57bc98c 00000002 00000000 f0275e38 f6a80000 Oct 7 15:20:01 scaph kernel: [ 292.007654] Call Trace: Oct 7 15:20:01 scaph kernel: [ 292.007704] [<f8b9c690>] ? i915_gem_object_put_pages_gtt+0x90/0x180 [i915] Oct 7 15:20:01 scaph kernel: [ 292.007776] [<c12b0088>] ? list_del+0x8/0x20 Oct 7 15:20:01 scaph kernel: [ 292.007838] [<f8b9a6ed>] ? i915_gem_object_put_pages+0x6d/0xd0 [i915] Oct 7 15:20:01 scaph kernel: [ 292.007919] [<f8b9d77a>] ? i915_gem_free_object+0x12a/0x2e0 [i915] Oct 7 15:20:01 scaph kernel: [ 292.007989] [<f88d8c95>] ? drm_gem_object_free+0x25/0x50 [drm] Oct 7 15:20:01 scaph kernel: [ 292.008054] [<f88d91c7>] ? drm_gem_object_handle_unreference_unlocked+0xe7/0x100 [drm] Oct 7 15:20:01 scaph kernel: [ 292.008137] [<f88d926c>] ? drm_gem_handle_delete+0x8c/0xd0 [drm] Oct 7 15:20:01 scaph kernel: [ 292.008203] [<f88d97f0>] ? drm_gem_handle_create+0x30/0x30 [drm] Oct 7 15:20:01 scaph kernel: [ 292.011383] [<f88da0b3>] ? drm_ioctl+0x123/0x4d0 [drm] Oct 7 15:20:01 scaph kernel: [ 292.014574] [<f88d97f0>] ? drm_gem_handle_create+0x30/0x30 [drm] Oct 7 15:20:01 scaph kernel: [ 292.017689] [<c11420c5>] ? free_pages_prepare+0x1a5/0x2e0 Oct 7 15:20:01 scaph kernel: [ 292.020777] [<c1164689>] ? tlb_finish_mmu+0x29/0x40 Oct 7 15:20:01 scaph kernel: [ 292.023860] [<c116a727>] ? unmap_region+0x97/0xd0 Oct 7 15:20:01 scaph kernel: [ 292.026934] [<f88d9f90>] ? drm_getmap+0xc0/0xc0 [drm] Oct 7 15:20:01 scaph kernel: [ 292.029991] [<c11aaa92>] ? do_vfs_ioctl+0x2e2/0x500 Oct 7 15:20:01 scaph kernel: [ 292.033027] [<c116a79e>] ? remove_vma+0x3e/0x50 Oct 7 15:20:01 scaph kernel: [ 292.036037] [<c116cacd>] ? do_munmap+0x23d/0x360 Oct 7 15:20:01 scaph kernel: [ 292.039110] [<c11aad18>] ? SyS_ioctl+0x68/0x80 Oct 7 15:20:01 scaph kernel: [ 292.039134] [<c150ab17>] ? sysenter_do_call+0x12/0x12 Oct 7 15:20:01 scaph kernel: [ 292.039173] Code: 09 74 cc eb dd 89 f0 e8 46 f8 ff ff 31 d2 89 f0 e8 3d 86 ff ff eb cb 8d 74 26 00 8d bc 27 00 00 00 00 55 89 e5 53 3e 8d 74 26 00 <f7> 00 00 c0 00 00 75 27 f0 ff 48 10 74 09 5b 5d c3 8d b6 00 00 Oct 7 15:20:01 scaph kernel: [ 292.039178] EIP: [<c114a6b9>] put_page+0x9/0x40 SS:ESP 0068:f0275da0 Oct 7 15:20:01 scaph kernel: [ 292.039180] CR2: 00000000000b0000 Oct 7 15:20:01 scaph kernel: [ 292.062151] ---[ end trace 7dbf5e0bc21ce092 ]--- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1177394 Title: USB sequence errors in snd_usb_usx2y To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1177394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
