https://bugzilla.kernel.org/show_bug.cgi?id=113001
Bug ID: 113001
Summary: usb ethernet adator not detected on hotplug
Product: ACPI
Version: 2.5
Kernel Version: 4.4.1
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Hotplug
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 204471
--> https://bugzilla.kernel.org/attachment.cgi?id=204471&action=edit
Picture of display showing messages printed when laptop hangs on reboot
I have one of the new dell XPS 15 laptops (model 9550) and a dell USB-C
ethernet adapter.
On a fresh boot I plug the USB-C ethernet adapter (with ethernet cable
attached) and nothing happens. No new interfaces appear and no kernel messages
are printed.
After a couple of minutes this message appears in dmesg:
[ 240.280027] INFO: task kworker/0:2:111 blocked for more than 120 seconds.
[ 240.280030] Tainted: G U O 4.4.1-2-ARCH #1
[ 240.280031] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 240.280032] kworker/0:2 D ffff8804ab5a7b58 0 111 2 0x00000000
[ 240.280040] Workqueue: kacpid acpi_os_execute_deferred
[ 240.280041] ffff8804ab5a7b58 ffffffff8137774a ffffffff81810500
ffff8804abf50ec0
[ 240.280043] ffff8804ab5a8000 ffff8804a77448a0 ffff8804abf50ec0
ffff8804abb09320
[ 240.280045] ffff8804aa8e7a00 ffff8804ab5a7b70 ffffffff8158e03c
7fffffffffffffff
[ 240.280047] Call Trace:
[ 240.280050] [<ffffffff8137774a>] ? acpi_ut_repair_name+0x2a/0x74
[ 240.280053] [<ffffffff8158e03c>] schedule+0x3c/0x90
[ 240.280056] [<ffffffff81590ab3>] schedule_timeout+0x1b3/0x240
[ 240.280057] [<ffffffff8137774a>] ? acpi_ut_repair_name+0x2a/0x74
[ 240.280060] [<ffffffff8136c0c6>] ? acpi_ns_search_one_scope+0x25/0x45
[ 240.280062] [<ffffffff8136c235>] ? acpi_ns_search_and_enter+0x14f/0x1ab
[ 240.280064] [<ffffffff8158fd34>] __down_timeout+0x74/0xd0
[ 240.280066] [<ffffffff810bdb87>] ? down_timeout+0x37/0x60
[ 240.280068] [<ffffffff810bdb9c>] down_timeout+0x4c/0x60
[ 240.280070] [<ffffffff813478bf>] acpi_os_wait_semaphore+0x4c/0x67
[ 240.280072] [<ffffffff81367243>] acpi_ex_system_wait_mutex+0x3c/0x4d
[ 240.280074] [<ffffffff81359b28>] acpi_ds_begin_method_execution+0x13f/0x1d8
[ 240.280076] [<ffffffff81359db4>] acpi_ds_call_control_method+0x54/0x17b
[ 240.280078] [<ffffffff8136f3ab>] acpi_ps_parse_aml+0xaf/0x26f
[ 240.280079] [<ffffffff8136fc11>] acpi_ps_execute_method+0x14b/0x186
[ 240.280081] [<ffffffff8136a151>] acpi_ns_evaluate+0x1bb/0x247
[ 240.280083] [<ffffffff8135d6f9>]
acpi_ev_asynch_execute_gpe_method+0xa0/0x105
[ 240.280085] [<ffffffff81346bce>] acpi_os_execute_deferred+0x14/0x20
[ 240.280088] [<ffffffff8108e21b>] process_one_work+0x14b/0x440
[ 240.280090] [<ffffffff8108e558>] worker_thread+0x48/0x4a0
[ 240.280092] [<ffffffff8108e510>] ? process_one_work+0x440/0x440
[ 240.280094] [<ffffffff8108e510>] ? process_one_work+0x440/0x440
[ 240.280095] [<ffffffff81093ff8>] kthread+0xd8/0xf0
[ 240.280097] [<ffffffff81093f20>] ? kthread_worker_fn+0x170/0x170
[ 240.280099] [<ffffffff81591e8f>] ret_from_fork+0x3f/0x70
[ 240.280100] [<ffffffff81093f20>] ? kthread_worker_fn+0x170/0x170
The message re-appears continuously every 2 minutes or so.
Then I try to reboot but it never fully manages to powerdown. I attach a
picture of the screen to show the messages that are printed when it hangs on
reboot.
If I boot the computer with the USB-C ethernet adapter already plugged in
everything seems to work nicely. I get an ethernet interface (enp10s0u1)
handled by driver cdc_ether. No weird kernel messages and the laptop reboots
fine.
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