Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753377AbXLaUDt (ORCPT ); Mon, 31 Dec 2007 15:03:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751793AbXLaUDl (ORCPT ); Mon, 31 Dec 2007 15:03:41 -0500 Received: from iolanthe.rowland.org ([192.131.102.54]:48171 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751616AbXLaUDj (ORCPT ); Mon, 31 Dec 2007 15:03:39 -0500 Date: Mon, 31 Dec 2007 15:03:38 -0500 (EST) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: Andrew Morton cc: Victor Hahn , , Jaroslav Kysela , Takashi Iwai , Subject: Re: Can't disconnect a USB sound device and connect another In-Reply-To: <20071225140450.b6d742bb.akpm@linux-foundation.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6072 Lines: 121 On Tue, 25 Dec 2007, Andrew Morton wrote: > On Sun, 23 Dec 2007 23:36:11 +0100 Victor Hahn wrote: > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > ... because it causes lsusb to freeze and gives me this in /var/log/messages: > > Has this always happened, or is it something we introduced in a recent > kernel? > > > Dec 23 23:27:04 cabrio kernel: usb 2-2: USB disconnect, address 5 > > Dec 23 23:27:04 cabrio kernel: PGD 110f2067 PUD 110f3067 PMD 0 > > Dec 23 23:27:04 cabrio kernel: CPU 0 > > Dec 23 23:27:04 cabrio kernel: Modules linked in: videodev v4l2_common > > v4l1_compat snd_rtctimer binfmt_misc rfcomm l2cap bluetooth capability > > commoncap ppdev powernow_k8 cpufreq_userspace cpufreq_stats cpufreq_powersave > > cpufreq_ondemand freq_table cpufreq_conservative video output sbs container > > dock ac battery ext3 jbd mbcache aes_x86_64 ipv6 it87 hwmon_vid parport_pc lp > > parport loop snd_mpu401 snd_mpu401_uart snd_usb_audio snd_pcm_oss > > snd_mixer_oss snd_pcm snd_seq_dummy snd_page_alloc snd_usb_lib snd_hwdep > > snd_seq_oss analog gameport snd_seq_midi snd_rawmidi snd_seq_midi_event > > snd_seq snd_timer snd_seq_device snd psmouse button soundcore serio_raw > > i2c_nforce2 k8temp i2c_core pcspkr af_packet shpchp pci_hotplug evdev xfs > > sha256 twofish_x86_64 twofish_common cbc blkcipher sg ide_cd cdrom sd_mod > > usbhid hid sata_nv 8139too floppy ata_generic 8139cp mii libata scsi_mod > > amd74xx ide_core forcedeth ehci_hcd ohci_hcd usbcore dm_crypt dm_mirror > > dm_snapshot dm_mod thermal processor fan fuse > > Dec 23 23:27:04 cabrio kernel: Pid: 2052, comm: khubd Not tainted 2.6.23.11 #1 > > Dec 23 23:27:04 cabrio kernel: RIP: 0010:[_end+130488219/2130651808] > > [_end+130488219/2130651808] :snd:snd_ctl_dev_disconnect+0x6b/0xb0 > > Dec 23 23:27:04 cabrio kernel: RSP: 0018:ffff810037bfdc40 EFLAGS: 00010282 > > Dec 23 23:27:04 cabrio kernel: RAX: 0000000000000000 RBX: 0000000000100100 > > RCX: 0000000000000018 > > Dec 23 23:27:04 cabrio kernel: RDX: 0000000000020004 RSI: 000000000000001d > > RDI: ffff810013e98c08 > > Dec 23 23:27:04 cabrio kernel: RBP: ffff8100394631a8 R08: ffff810037bfc000 > > R09: 0000000000000000 > > Dec 23 23:27:04 cabrio kernel: R10: 0000000000000000 R11: ffffffff88281910 > > R12: ffff810039463000 > > Dec 23 23:27:04 cabrio kernel: R13: ffff810039463168 R14: 0000000000000000 > > R15: ffff810039463000 > > Dec 23 23:27:04 cabrio kernel: FS: 00002b24912551e0(0000) GS:ffffffff80533000 > > (0000) knlGS:00000000f74b16c0 > > Dec 23 23:27:04 cabrio kernel: CS: 0010 DS: 0018 ES: 0018 CR0: > > 000000008005003b > > Dec 23 23:27:04 cabrio kernel: CR2: 0000000000100100 CR3: 00000000110f1000 > > CR4: 00000000000006e0 > > Dec 23 23:27:04 cabrio kernel: DR0: 0000000000000000 DR1: 0000000000000000 > > DR2: 0000000000000000 > > Dec 23 23:27:04 cabrio kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 > > DR7: 0000000000000400 > > Dec 23 23:27:04 cabrio kernel: Process khubd (pid: 2052, threadinfo > > ffff810037bfc000, task ffff81003d67d0c0) > > Dec 23 23:27:04 cabrio kernel: Stack: 0000000000000000 ffff810038850d00 > > ffff810039463000 ffff810039463150 > > Dec 23 23:27:04 cabrio kernel: 0000000000000000 ffffffff88281e69 > > ffff810038850d00 ffffffff882821ac > > Dec 23 23:27:04 cabrio kernel: 0000000000000000 0000000000000000 > > ffff810039463000 ffff8100394631e0 > > Dec 23 23:27:04 cabrio kernel: Call Trace: > > Dec 23 23:27:04 cabrio kernel: > > [_end+130500873/2130651808] :snd:snd_device_disconnect+0x59/0x90 > > Dec 23 23:27:04 cabrio kernel: > > [_end+130501708/2130651808] :snd:snd_device_disconnect_all+0x3c/0x70 > > Dec 23 23:27:04 cabrio kernel: > > [_end+130481675/2130651808] :snd:snd_card_disconnect+0x15b/0x1a0 > > Dec 23 23:27:04 cabrio kernel: > > [_end+131093678/2130651808] :snd_usb_audio:usb_audio_disconnect+0xae/0x1a0 > > Dec 23 23:27:04 cabrio kernel: > > [_end+128211869/2130651808] :usbcore:usb_unbind_interface+0x6d/0xe0 > > Dec 23 23:27:04 cabrio kernel: [__device_release_driver+130/192] > > __device_release_driver+0x82/0xc0 > > Dec 23 23:27:04 cabrio kernel: [device_release_driver+51/96] > > device_release_driver+0x33/0x60 > > Dec 23 23:27:04 cabrio kernel: [bus_remove_device+118/176] > > bus_remove_device+0x76/0xb0 > > Dec 23 23:27:04 cabrio kernel: [device_del+417/736] device_del+0x1a1/0x2e0 > > Dec 23 23:27:04 cabrio kernel: > > [_end+128198657/2130651808] :usbcore:usb_disable_device+0x91/0x110 > > Dec 23 23:27:04 cabrio kernel: > > [_end+128179466/2130651808] :usbcore:usb_disconnect+0xaa/0x150 > > Dec 23 23:27:04 cabrio kernel: > > [_end+128181649/2130651808] :usbcore:hub_thread+0x401/0xe30 > > Dec 23 23:27:04 cabrio kernel: [thread_return+87/1463] > > thread_return+0x57/0x5b7 > > Dec 23 23:27:04 cabrio kernel: [autoremove_wake_function+0/48] > > autoremove_wake_function+0x0/0x30 > > Dec 23 23:27:04 cabrio kernel: > > [_end+128180624/2130651808] :usbcore:hub_thread+0x0/0xe30 > > Dec 23 23:27:04 cabrio kernel: [kthread+75/128] kthread+0x4b/0x80 > > Dec 23 23:27:04 cabrio kernel: [child_rip+10/18] child_rip+0xa/0x12 > > Dec 23 23:27:04 cabrio kernel: [kthread+0/128] kthread+0x0/0x80 > > Dec 23 23:27:04 cabrio kernel: [child_rip+0/18] child_rip+0x0/0x12 > > Dec 23 23:27:04 cabrio kernel: > > Dec 23 23:27:04 cabrio kernel: > > Dec 23 23:27:04 cabrio kernel: Code: 48 8b 03 0f 18 08 48 39 eb 75 ca 4c 89 ef > > e8 d2 35 fd f7 ba > > Dec 23 23:27:04 cabrio kernel: RSP > > > > Is there a way to exchange USB audio devices without rebooting? > > First we have to work out if it's a USB bug or an ALSA bug. I'd guess > ALSA, but not with a lot of confidence. > > Anyone? See http://bugzilla.kernel.org/show_bug.cgi?id=9196 This looks the same as that. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/