When plugging an audio interface in with nomodeset I see the following in the logs:
Aug 08 23:19:23 localhost.localdomain kernel: INFO: task pulseaudio:1750 blocked for more than 120 seconds. Aug 08 23:19:23 localhost.localdomain kernel: Tainted: G OE 4.17.11-200.fc28.x86_64+debug #1 Aug 08 23:19:23 localhost.localdomain kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Aug 08 23:19:23 localhost.localdomain kernel: pulseaudio D12408 1750 1268 0x00000000 Aug 08 23:19:23 localhost.localdomain kernel: Call Trace:
Aug 08 23:19:23 localhost.localdomain kernel: ? __schedule+0x2ba/0xaf0
Aug 08 23:19:23 localhost.localdomain kernel: ? prepare_to_wait_event+0xd2/0x180 Aug 08 23:19:23 localhost.localdomain kernel: schedule+0x2f/0x90
Aug 08 23:19:23 localhost.localdomain kernel: usX2Y_urbs_start+0x208/0x470 [snd_usb_usx2y] Aug 08 23:19:23 localhost.localdomain kernel: ? finish_wait+0x80/0x80
Aug 08 23:19:23 localhost.localdomain kernel: snd_usX2Y_pcm_prepare+0xb4/0xd0 [snd_usb_usx2y] Aug 08 23:19:23 localhost.localdomain kernel: snd_pcm_do_prepare+0x19/0x30 [snd_pcm] Aug 08 23:19:23 localhost.localdomain kernel: snd_pcm_action_single+0x36/0x80 [snd_pcm] Aug 08 23:19:23 localhost.localdomain kernel: snd_pcm_action_nonatomic+0x61/0x70 [snd_pcm] Aug 08 23:19:23 localhost.localdomain kernel: snd_pcm_common_ioctl+0x3d2/0xb70 [snd_pcm] Aug 08 23:19:23 localhost.localdomain kernel: ? selinux_file_ioctl+0x171/0x210 Aug 08 23:19:23 localhost.localdomain kernel: snd_pcm_ioctl+0x23/0x30 [snd_pcm] Aug 08 23:19:23 localhost.localdomain kernel: do_vfs_ioctl+0xa5/0x6d0
Aug 08 23:19:23 localhost.localdomain kernel: ksys_ioctl+0x60/0x90
Aug 08 23:19:23 localhost.localdomain kernel: __x64_sys_ioctl+0x16/0x20
Aug 08 23:19:23 localhost.localdomain kernel: do_syscall_64+0x60/0x1f0
Aug 08 23:19:23 localhost.localdomain kernel: entry_SYSCALL_64_after_hwframe+0x49/0xbe Aug 08 23:19:23 localhost.localdomain kernel: RIP: 0033:0x7f59021c4ec7
Aug 08 23:19:23 localhost.localdomain kernel: RSP: 002b:00007ffd83d81448 EFLAGS: 00000206 ORIG_RAX: 0000000000000010 Aug 08 23:19:23 localhost.localdomain kernel: RAX: ffffffffffffffda RBX: 0000556d69312220 RCX: 00007f59021c4ec7 Aug 08 23:19:23 localhost.localdomain kernel: RDX: 0000556d6931ae20 RSI: 0000000000004140 RDI: 0000000000000016 Aug 08 23:19:23 localhost.localdomain kernel: RBP: 00007ffd83d81b60 R08: 0000000000000000 R09: 0000000000001138 Aug 08 23:19:23 localhost.localdomain kernel: R10: 0000000000000004 R11: 0000000000000206 R12: 00007ffd83d81830 Aug 08 23:19:23 localhost.localdomain kernel: R13: 00007ffd83d81cf4 R14: 0000000000000000 R15: 00007ffd83d815c0 Aug 08 23:19:23 localhost.localdomain kernel:
Showing all locks held in the system: Aug 08 23:19:23 localhost.localdomain kernel: 1 lock held by khungtaskd/38: Aug 08 23:19:23 localhost.localdomain kernel: #0: 00000000b04056c7 (tasklist_lock){.+.+}, at: debug_show_all_locks+0x3e/0x165 Aug 08 23:19:23 localhost.localdomain kernel: 2 locks held by pulseaudio/1750: Aug 08 23:19:23 localhost.localdomain kernel: #0: 000000008d30dafb (snd_pcm_link_rwsem){++++}, at: snd_pcm_action_nonatomic+0x1e/0x70 [snd_pcm] Aug 08 23:19:23 localhost.localdomain kernel: #1: 00000000c8fc4ab6 (&usX2Y(card)->pcm_mutex){+.+.}, at: snd_usX2Y_pcm_prepare+0x38/0xd0 [snd_usb_usx2y]
The audio interface doesn't work and without nomodeset X freezes.
Any help pointing me in the right direction would be greatly appreciated. It looks like an issue with the snd_usb_usx2y driver to me, but I'm not sure.
Joe Spencer