Plugging in a USB-C power source on my Dell XPS 9550 trips an ACPI
BUG_ON [1], reproducible with mainline 4.14.44, suggesting other
threads are waiting for semaphore acquisition due to
"BUG_ON(!list_empty(&sem->wait_list))".
This is the current 1.7.0 BIOS with Ubuntu 18.04 userspace, plugging
in an LG 27UD88 (also with the current firmware) monitor USB-C
connection which apparently advertises 60W charging (x1,
PowerDelivery, DisplayPort alternative mode, data). The same issues
reproduce on a Dell Precision 5510 with Ubuntu 16.04, the shipped
kernel and 4.14.44.
I can enable ACPI debugging if useful? Perhaps ACPI_DB_MUTEX or other
levels would be appropriate?
Thanks,
Daniel
-- [1]
kernel BUG at /home/kernel/COD/linux/drivers/acpi/osl.c:1201
invalid opcode: 0000 [#1] SMP PTI
Modules linked in: [...]
CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 4.14.44-041444-generic
#201805251612
Hardware name: Dell Inc. XPS 15 9550/, BIOS 1.7.0 02/23/2018
task: ffff9bc2ab6b9740 task.stack: ffffbOca80034000
RIP: 0010:acpi_os_delete_semaphore+0x6d/0x70
RSP: 0018:ffffbOca80037be8 EFLAGS: 00010283
RAX: ffffbOca83f8fc40 RBX: ffff9bc238b5dbe0 RCX: 0000000000000000
RDX: ffff9bc238b5dbe8 RSI: 0000000000000000 RDI: ffff9bc238b5dbe0
RBP: ffff9bc2adlc0990 ROB: ffff9bc2bdc25f20 R09: ffff9bc29ee56300
R10: ffffe03bd2796440 R11: ffff9bc2ad183fa0 R12: ffff9bc22f1321e0
R13: 0000000000000001 R14: 0000000000000001 R15: ffff9bc22f132eb0
FS: 00007fc03886f940(0000) GS:ffff9bc2bdc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CRO: 0000000080050033
CR2: 00007ffc645e70f8 CR3: 000000049e120001 CR4: 00000000003606f0
Call Trace:
acpi_ex_system_reset_event+0x3f/0x65
acpi_ex_opcode_1A_OT_0R+0x70/0xfa
acpi_ds_exec_end_op+0x15d/0x71b
acpi_ps_parse_loop+0x929/0x9d6
? acpi_ds_result_push+0x82/0x1d2
acpi_ps_parse_aml+0x1a2/0x4af
acpi_ps_execute_method+0x1ef/0x2ab
acpi_ns_evaluate+0x2e4/0x41d
acpi_evaluate_object+0x1cb/0x38e
acpi_enter_sleep_state_prep+0xae/0x13a
acpi_sleep_prepare.part.2+0x2e/0x40
acpi_power_off_prepare+0xf/0x20
[38871.1925361 kernel_power_off+0x42/0x70
SYSC_reboot+0x12f/0x210
? handle_mm_fault+0xea/0x1e0
[38871.1925861 ? do_writev+0x5e/0xf0
? do_writev+0x5e/0xf0
do_syscall_64+0x6e/0x120
entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x7fc03839b373
RSP: 002b:00007ffc645e70f8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a9
RAX: ffffffffffffffda RBX: 000000004321fedc RCX: 00007fc03839b373
ROX: 000000004321fedc RSI: 0000000028121969 RDI: 00000000fee1dead
RBP: 00007ffc645e7160 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000202 R12: 00007ffc645e7168
R13: 0000000000000000 R14: 0000001b00000004 R15: 00007ffc645e7458
Code: b8 00 04 00 00 48 c7 c1 c3 91 28 ab 48 c7 c2 20 91 28 ab be of
04 00 00 bf 00 00 00 01 03 41 85 04 00 58 eb b0 b8 01 10 00 00 c3 <Of>
Ob 90 Of if 44 00 00 80 3d 74 CO 97 01 00 41 54 55 53 Of 84
RIP: acpi_os_delete_semaphore+0x6d/0x70 RSP: ffffb0ca80037be8
--
Daniel J Blueman
> -----Original Message-----
> From: Daniel J Blueman [mailto:[email protected]]
> Sent: Thursday, May 31, 2018 9:21 PM
> To: Linux Kernel; [email protected]
> Cc: Limonciello, Mario; Dominguez, Jared
> Subject: 4.14.44: BUG_ON(!list_empty(&sem->wait_list));
>
> Plugging in a USB-C power source on my Dell XPS 9550 trips an ACPI
> BUG_ON [1], reproducible with mainline 4.14.44, suggesting other
> threads are waiting for semaphore acquisition due to
> "BUG_ON(!list_empty(&sem->wait_list))".
>
> This is the current 1.7.0 BIOS with Ubuntu 18.04 userspace, plugging
> in an LG 27UD88 (also with the current firmware) monitor USB-C
> connection which apparently advertises 60W charging (x1,
> PowerDelivery, DisplayPort alternative mode, data). The same issues
> reproduce on a Dell Precision 5510 with Ubuntu 16.04, the shipped
> kernel and 4.14.44.
>
> I can enable ACPI debugging if useful? Perhaps ACPI_DB_MUTEX or other
> levels would be appropriate?
I think most useful would be if this can still reproduce with 4.17.
>
> Thanks,
> Daniel
>
> -- [1]
>
> kernel BUG at /home/kernel/COD/linux/drivers/acpi/osl.c:1201
> invalid opcode: 0000 [#1] SMP PTI
> Modules linked in: [...]
> CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 4.14.44-041444-generic
> #201805251612
> Hardware name: Dell Inc. XPS 15 9550/, BIOS 1.7.0 02/23/2018
> task: ffff9bc2ab6b9740 task.stack: ffffbOca80034000
> RIP: 0010:acpi_os_delete_semaphore+0x6d/0x70
> RSP: 0018:ffffbOca80037be8 EFLAGS: 00010283
> RAX: ffffbOca83f8fc40 RBX: ffff9bc238b5dbe0 RCX: 0000000000000000
> RDX: ffff9bc238b5dbe8 RSI: 0000000000000000 RDI: ffff9bc238b5dbe0
> RBP: ffff9bc2adlc0990 ROB: ffff9bc2bdc25f20 R09: ffff9bc29ee56300
> R10: ffffe03bd2796440 R11: ffff9bc2ad183fa0 R12: ffff9bc22f1321e0
> R13: 0000000000000001 R14: 0000000000000001 R15: ffff9bc22f132eb0
> FS: 00007fc03886f940(0000) GS:ffff9bc2bdc00000(0000)
> knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CRO: 0000000080050033
> CR2: 00007ffc645e70f8 CR3: 000000049e120001 CR4: 00000000003606f0
> Call Trace:
> acpi_ex_system_reset_event+0x3f/0x65
> acpi_ex_opcode_1A_OT_0R+0x70/0xfa
> acpi_ds_exec_end_op+0x15d/0x71b
> acpi_ps_parse_loop+0x929/0x9d6
> ? acpi_ds_result_push+0x82/0x1d2
> acpi_ps_parse_aml+0x1a2/0x4af
> acpi_ps_execute_method+0x1ef/0x2ab
> acpi_ns_evaluate+0x2e4/0x41d
> acpi_evaluate_object+0x1cb/0x38e
> acpi_enter_sleep_state_prep+0xae/0x13a
> acpi_sleep_prepare.part.2+0x2e/0x40
> acpi_power_off_prepare+0xf/0x20
> [38871.1925361 kernel_power_off+0x42/0x70
> SYSC_reboot+0x12f/0x210
> ? handle_mm_fault+0xea/0x1e0
> [38871.1925861 ? do_writev+0x5e/0xf0
> ? do_writev+0x5e/0xf0
> do_syscall_64+0x6e/0x120
> entry_SYSCALL_64_after_hwframe+0x3d/0xa2
> RIP: 0033:0x7fc03839b373
> RSP: 002b:00007ffc645e70f8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a9
> RAX: ffffffffffffffda RBX: 000000004321fedc RCX: 00007fc03839b373
> ROX: 000000004321fedc RSI: 0000000028121969 RDI: 00000000fee1dead
> RBP: 00007ffc645e7160 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000002 R11: 0000000000000202 R12: 00007ffc645e7168
> R13: 0000000000000000 R14: 0000001b00000004 R15: 00007ffc645e7458
> Code: b8 00 04 00 00 48 c7 c1 c3 91 28 ab 48 c7 c2 20 91 28 ab be of
> 04 00 00 bf 00 00 00 01 03 41 85 04 00 58 eb b0 b8 01 10 00 00 c3 <Of>
> Ob 90 Of if 44 00 00 80 3d 74 CO 97 01 00 41 54 55 53 Of 84
> RIP: acpi_os_delete_semaphore+0x6d/0x70 RSP: ffffb0ca80037be8
> --
> Daniel J Blueman
On 5 June 2018 at 05:47, <[email protected]> wrote:
>> -----Original Message-----
>> From: Daniel J Blueman [mailto:[email protected]]
>> Sent: Thursday, May 31, 2018 9:21 PM
>> To: Linux Kernel; [email protected]
>> Cc: Limonciello, Mario; Dominguez, Jared
>> Subject: 4.14.44: BUG_ON(!list_empty(&sem->wait_list));
>>
>> Plugging in a USB-C power source on my Dell XPS 9550 trips an ACPI
>> BUG_ON [1], reproducible with mainline 4.14.44, suggesting other
>> threads are waiting for semaphore acquisition due to
>> "BUG_ON(!list_empty(&sem->wait_list))".
>>
>> This is the current 1.7.0 BIOS with Ubuntu 18.04 userspace, plugging
>> in an LG 27UD88 (also with the current firmware) monitor USB-C
>> connection which apparently advertises 60W charging (x1,
>> PowerDelivery, DisplayPort alternative mode, data). The same issues
>> reproduce on a Dell Precision 5510 with Ubuntu 16.04, the shipped
>> kernel and 4.14.44.
>>
>> I can enable ACPI debugging if useful? Perhaps ACPI_DB_MUTEX or other
>> levels would be appropriate?
>
> I think most useful would be if this can still reproduce with 4.17.
Fair suggestion!
I can achieve 100% reproducibility of the same backtrace on a clean
Ubuntu 18.04 install with 4.17 mainline [1]:
1. disable grub 'quiet' parameter, disconnect charger and power off laptop to S5
2. power on laptop from S5
3. suspend via closing lid
4. resume by opening lid
5. connect LG 27UD88 via USB-C
6. wait 20s
7. disconnect LG 27UD88
8. run 'systemctl poweroff'
9. observe the same backtrace from acpi_os_delete_semaphore
I don't observe the issue when using an Apple 87W USB-C Power Adapter,
so it may reproduce on other monitors advertising USB-C DisplayPort
alternate mode.
Thanks,
Daniel
[1] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.17/linux-image-unsigned-4.17.0-041700-generic_4.17.0-041700.201806041953_amd64.deb
>> kernel BUG at /home/kernel/COD/linux/drivers/acpi/osl.c:1201
>> invalid opcode: 0000 [#1] SMP PTI
>> Modules linked in: [...]
>> CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 4.14.44-041444-generic
>> #201805251612
>> Hardware name: Dell Inc. XPS 15 9550/, BIOS 1.7.0 02/23/2018
>> task: ffff9bc2ab6b9740 task.stack: ffffbOca80034000
>> RIP: 0010:acpi_os_delete_semaphore+0x6d/0x70
>> RSP: 0018:ffffbOca80037be8 EFLAGS: 00010283
>> RAX: ffffbOca83f8fc40 RBX: ffff9bc238b5dbe0 RCX: 0000000000000000
>> RDX: ffff9bc238b5dbe8 RSI: 0000000000000000 RDI: ffff9bc238b5dbe0
>> RBP: ffff9bc2adlc0990 ROB: ffff9bc2bdc25f20 R09: ffff9bc29ee56300
>> R10: ffffe03bd2796440 R11: ffff9bc2ad183fa0 R12: ffff9bc22f1321e0
>> R13: 0000000000000001 R14: 0000000000000001 R15: ffff9bc22f132eb0
>> FS: 00007fc03886f940(0000) GS:ffff9bc2bdc00000(0000)
>> knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CRO: 0000000080050033
>> CR2: 00007ffc645e70f8 CR3: 000000049e120001 CR4: 00000000003606f0
>> Call Trace:
>> acpi_ex_system_reset_event+0x3f/0x65
>> acpi_ex_opcode_1A_OT_0R+0x70/0xfa
>> acpi_ds_exec_end_op+0x15d/0x71b
>> acpi_ps_parse_loop+0x929/0x9d6
>> ? acpi_ds_result_push+0x82/0x1d2
>> acpi_ps_parse_aml+0x1a2/0x4af
>> acpi_ps_execute_method+0x1ef/0x2ab
>> acpi_ns_evaluate+0x2e4/0x41d
>> acpi_evaluate_object+0x1cb/0x38e
>> acpi_enter_sleep_state_prep+0xae/0x13a
>> acpi_sleep_prepare.part.2+0x2e/0x40
>> acpi_power_off_prepare+0xf/0x20
>> [38871.1925361 kernel_power_off+0x42/0x70
>> SYSC_reboot+0x12f/0x210
>> ? handle_mm_fault+0xea/0x1e0
>> [38871.1925861 ? do_writev+0x5e/0xf0
>> ? do_writev+0x5e/0xf0
>> do_syscall_64+0x6e/0x120
>> entry_SYSCALL_64_after_hwframe+0x3d/0xa2
>> RIP: 0033:0x7fc03839b373
>> RSP: 002b:00007ffc645e70f8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a9
>> RAX: ffffffffffffffda RBX: 000000004321fedc RCX: 00007fc03839b373
>> ROX: 000000004321fedc RSI: 0000000028121969 RDI: 00000000fee1dead
>> RBP: 00007ffc645e7160 R08: 0000000000000000 R09: 0000000000000000
>> R10: 0000000000000002 R11: 0000000000000202 R12: 00007ffc645e7168
>> R13: 0000000000000000 R14: 0000001b00000004 R15: 00007ffc645e7458
>> Code: b8 00 04 00 00 48 c7 c1 c3 91 28 ab 48 c7 c2 20 91 28 ab be of
>> 04 00 00 bf 00 00 00 01 03 41 85 04 00 58 eb b0 b8 01 10 00 00 c3 <Of>
>> Ob 90 Of if 44 00 00 80 3d 74 CO 97 01 00 41 54 55 53 Of 84
>> RIP: acpi_os_delete_semaphore+0x6d/0x70 RSP: ffffb0ca80037be8
--
Daniel J Blueman