ddcutil fails when called too quickly? #86
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Looking at the trace, the hang is deep in the amdgpu driver, more
specifically in the DisplayPort I2C-over-aux handling. As a result, a
ddcutil call to i2c is hanging.
ddcutil could be rewritten to run i2c system calls in a separate thread,
catch the SIGTERM and SIGKILL signals, and terminate execution, but that
would add a lot of complexity for a problem that has never been reported
before and appears to be caused by a driver bug.
Taking a cursory look at the amdgpu driver forums, it appears that there
have been significant changes in this area in kernel 4.19. (You're on
4.18.) See, for example, bug 105724 at bugs.feedesktop.org.
If the problem does not resolve with 4.19, I suggest you post a bug to
bugs.freedesktop.org. The initial response will likely ask if you've
installed the latest development driver.
Are your monitors daisy-chained DisplayPort devices? That's a
particularly problematic area.
Please run command "ddcutil interrogate" and send the output as an
attachment. That may give me some further insight into what is going on.
Sanford
…On 6/26/19 4:56 PM, Nick Vahalik wrote:
I was using Argos <https://github.com/p-e-w/argos> to write a script
that sits in the Gnome Shell and would allow me to set some monitor
configurations there.
After messing up on the script, I started noticing that the script
stopped working and that subsequent calls to |ddcutil| just hung.
Like... cannot |Ctrl+C| and cannot |kill -9 <pid-of-hung-ddcutil>|.
The only thing that makes them disappear is a /hard/ system reboot.
The system will just hang if I try to reboot.
Note that everything else works perfectly and this issue only surfaced
after scripting calls to ddcutil. I do have two monitors, if that matters.
Here's the output from |dmesg|, which appears to be relevant.
|[ 364.474872] Modules linked in: nls_iso8859_1 amdkfd amd_iommu_v2
edac_mce_amd snd_hda_codec_realtek eeepc_wmi snd_hda_codec_generic
kvm_amd asus_wmi sparse_keymap amdgpu snd_hda_codec_hdmi wmi_bmof
video kvm mxm_wmi snd_hda_intel irqbypass snd_hda_codec
crct10dif_pclmul snd_hda_core crc32_pclmul ghash_clmulni_intel
snd_usb_audio snd_seq_midi pcbc snd_seq_midi_event snd_usbmidi_lib
snd_hwdep snd_rawmidi chash joydev input_leds snd_pcm gpu_sched
aesni_intel aes_x86_64 ttm snd_seq crypto_simd cryptd glue_helper
drm_kms_helper snd_seq_device snd_timer drm snd fb_sys_fops
syscopyarea sysfillrect sysimgblt soundcore ccp k10temp wmi mac_hid
sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4
hid_generic usbhid hid igb nvme i2c_piix4 i2c_algo_bit dca nvme_core
ahci libahci gpio_amdpt gpio_generic [ 364.474919] CPU: 12 PID: 7810
Comm: ddcutil Not tainted 4.18.0-24-generic #25~18.04.1-Ubuntu [
364.474920] Hardware name: System manufacturer System Product
Name/PRIME X470-PRO, BIOS 4207 12/07/2018 [ 364.474970] RIP:
0010:dal_gpio_open_ex+0x10/0x40 [amdgpu] [ 364.474971] Code: 48 89 e5
53 48 89 fb 48 8b 3f e8 2b 02 62 e4 48 c7 03 00 00 00 00 5b 5d c3 90
0f 1f 44 00 00 55 48 83 7f 08 00 48 89 e5 74 0e <0f> 0b e8 69 5d 51 e4
b8 05 00 00 00 5d c3 89 77 18 8b 57 14 4c 8d [ 364.474998] RSP:
0018:ffffb8018d6d7b88 EFLAGS: 00010282 [ 364.474999] RAX:
0000000000000000 RBX: ffff9ea7f8d98d00 RCX: 0000000000000037 [
364.475000] RDX: 0000000000000000 RSI: 0000000000000003 RDI:
ffff9ea7f8d983c0 [ 364.475001] RBP: ffffb8018d6d7b88 R08:
0000000000000000 R09: 0000000000000000 [ 364.475002] R10:
0000000000000da0 R11: 0000000000000000 R12: 0000000000000003 [
364.475003] R13: 0000000000000000 R14: 0000000000000000 R15:
ffffb8018d6d7d50 [ 364.475005] FS: 00007fbdbd2c7b80(0000)
GS:ffff9ea81ef00000(0000) knlGS:0000000000000000 [ 364.475006] CS:
0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 364.475007] CR2:
000055c07fcdde78 CR3: 000000069add2000 CR4: 00000000003406e0 [
364.475008] Call Trace: [ 364.475057] dal_ddc_open+0x32/0xe0 [amdgpu]
[ 364.475103] dal_aux_engine_acquire+0x37/0x70 [amdgpu] [ 364.475148]
dal_i2caux_acquire_aux_engine+0x58/0x80 [amdgpu] [ 364.475189]
dal_i2caux_submit_aux_command+0x4b/0x1c0 [amdgpu] [ 364.475194] ?
load_balance+0x164/0x9a0 [ 364.475239]
dal_ddc_service_read_dpcd_data+0x63/0xa0 [amdgpu] [ 364.475242] ?
syscall_return_via_sysret+0x13/0x83 [ 364.475289]
dm_dp_aux_transfer+0xac/0xc0 [amdgpu] [ 364.475296]
drm_dp_i2c_do_msg+0x86/0x270 [drm_kms_helper] [ 364.475298] ?
__switch_to_asm+0x34/0x70 [ 364.475303] drm_dp_i2c_xfer+0xc0/0x250
[drm_kms_helper] [ 364.475305] ? __switch_to_asm+0x40/0x70 [
364.475309] __i2c_transfer+0x119/0x420 [ 364.475311] ?
_cond_resched+0x19/0x40 [ 364.475313] i2c_transfer+0x5e/0xf0 [
364.475315] i2c_transfer_buffer_flags+0x4d/0x70 [ 364.475317]
i2cdev_read+0x77/0x120 [ 364.475321] __vfs_read+0x1b/0x40 [
364.475323] vfs_read+0x8e/0x130 [ 364.475325] ksys_read+0x55/0xc0 [
364.475327] __x64_sys_read+0x1a/0x20 [ 364.475329]
do_syscall_64+0x5a/0x120 [ 364.475332]
entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 364.475333] RIP:
0033:0x7fbdbbf46081 [ 364.475334] Code: fe ff ff 48 8d 3d 67 9c 0a 00
48 83 ec 08 e8 a6 4c 02 00 66 0f 1f 44 00 00 48 8d 05 81 08 2e 00 8b
00 85 c0 75 13 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 57 f3 c3 0f 1f 44 00
00 41 54 55 49 89 d4 53 [ 364.475360] RSP: 002b:00007ffe5c71a208
EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 364.475362] RAX:
ffffffffffffffda RBX: 0000000000000014 RCX: 00007fbdbbf46081 [
364.475363] RDX: 0000000000000014 RSI: 000055c07fcec430 RDI:
0000000000000003 [ 364.475364] RBP: 15abda1ca21f4c2f R08:
000055c07f85f4ee R09: 00007fbdbbfa4750 [ 364.475364] R10:
00007ffe5c71a1d0 R11: 0000000000000246 R12: 0000000000000003 [
364.475365] R13: 000055c07fcec430 R14: 000055c07fcec740 R15:
0000000000000000 [ 364.475367] ---[ end trace 8d9af36c08ebfc40 ]--- [
364.475374] int3: 0000 [#1] SMP NOPTI [ 364.475379] CPU: 12 PID: 7810
Comm: ddcutil Tainted: G W 4.18.0-24-generic #25~18.04.1-Ubuntu [
364.475381] Hardware name: System manufacturer System Product
Name/PRIME X470-PRO, BIOS 4207 12/07/2018 [ 364.475385] RIP:
0010:kgdb_breakpoint+0x14/0x20 [ 364.475386] Code: ea ff ff ff c3 90
0f 1f 44 00 00 55 31 c0 48 89 e5 5d c3 0f 1f 00 0f 1f 44 00 00 55 48
89 e5 f0 ff 05 68 7f 88 01 0f ae f8 cc <0f> ae f8 f0 ff 0d 5a 7f 88 01
5d c3 0f 1f 44 00 00 55 48 89 e5 e8 [ 364.475414] RSP:
0018:ffffb8018d6d7b78 EFLAGS: 00000202 [ 364.475416] RAX:
0000000000000000 RBX: ffff9ea7f8d98d00 RCX: 0000000000000037 [
364.475418] RDX: 0000000000000000 RSI: 0000000000000003 RDI:
ffff9ea7f8d983c0 [ 364.475419] RBP: ffffb8018d6d7b78 R08:
0000000000000000 R09: 0000000000000000 [ 364.475421] R10:
0000000000000da0 R11: 0000000000000000 R12: 0000000000000003 [
364.475422] R13: 0000000000000000 R14: 0000000000000000 R15:
ffffb8018d6d7d50 [ 364.475425] FS: 00007fbdbd2c7b80(0000)
GS:ffff9ea81ef00000(0000) knlGS:0000000000000000 [ 364.475427] CS:
0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 364.475428] CR2:
000055c07fcdde78 CR3: 000000069add2000 CR4: 00000000003406e0 [
364.475430] Call Trace: [ 364.475472] dal_gpio_open_ex+0x17/0x40
[amdgpu] [ 364.475513] dal_ddc_open+0x32/0xe0 [amdgpu] [ 364.475554]
dal_aux_engine_acquire+0x37/0x70 [amdgpu] [ 364.475594]
dal_i2caux_acquire_aux_engine+0x58/0x80 [amdgpu] [ 364.475632]
dal_i2caux_submit_aux_command+0x4b/0x1c0 [amdgpu] [ 364.475635] ?
load_balance+0x164/0x9a0 [ 364.475674]
dal_ddc_service_read_dpcd_data+0x63/0xa0 [amdgpu] [ 364.475677] ?
syscall_return_via_sysret+0x13/0x83 [ 364.475716]
dm_dp_aux_transfer+0xac/0xc0 [amdgpu] [ 364.475721]
drm_dp_i2c_do_msg+0x86/0x270 [drm_kms_helper] [ 364.475723] ?
__switch_to_asm+0x34/0x70 [ 364.475728] drm_dp_i2c_xfer+0xc0/0x250
[drm_kms_helper] [ 364.475731] ? __switch_to_asm+0x40/0x70 [
364.475733] __i2c_transfer+0x119/0x420 [ 364.475736] ?
_cond_resched+0x19/0x40 [ 364.475738] i2c_transfer+0x5e/0xf0 [
364.475741] i2c_transfer_buffer_flags+0x4d/0x70 [ 364.475743]
i2cdev_read+0x77/0x120 [ 364.475746] __vfs_read+0x1b/0x40 [
364.475748] vfs_read+0x8e/0x130 [ 364.475750] ksys_read+0x55/0xc0 [
364.475753] __x64_sys_read+0x1a/0x20 [ 364.475755]
do_syscall_64+0x5a/0x120 [ 364.475758]
entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 364.475759] RIP:
0033:0x7fbdbbf46081 [ 364.475760] Code: fe ff ff 48 8d 3d 67 9c 0a 00
48 83 ec 08 e8 a6 4c 02 00 66 0f 1f 44 00 00 48 8d 05 81 08 2e 00 8b
00 85 c0 75 13 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 57 f3 c3 0f 1f 44 00
00 41 54 55 49 89 d4 53 [ 364.475784] RSP: 002b:00007ffe5c71a208
EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 364.475786] RAX:
ffffffffffffffda RBX: 0000000000000014 RCX: 00007fbdbbf46081 [
364.475788] RDX: 0000000000000014 RSI: 000055c07fcec430 RDI:
0000000000000003 [ 364.475789] RBP: 15abda1ca21f4c2f R08:
000055c07f85f4ee R09: 00007fbdbbfa4750 [ 364.475791] R10:
00007ffe5c71a1d0 R11: 0000000000000246 R12: 0000000000000003 [
364.475792] R13: 000055c07fcec430 R14: 000055c07fcec740 R15:
0000000000000000 [ 364.475794] Modules linked in: nls_iso8859_1 amdkfd
amd_iommu_v2 edac_mce_amd snd_hda_codec_realtek eeepc_wmi
snd_hda_codec_generic kvm_amd asus_wmi sparse_keymap amdgpu
snd_hda_codec_hdmi wmi_bmof video kvm mxm_wmi snd_hda_intel irqbypass
snd_hda_codec crct10dif_pclmul snd_hda_core crc32_pclmul
ghash_clmulni_intel snd_usb_audio snd_seq_midi pcbc snd_seq_midi_event
snd_usbmidi_lib snd_hwdep snd_rawmidi chash joydev input_leds snd_pcm
gpu_sched aesni_intel aes_x86_64 ttm snd_seq crypto_simd cryptd
glue_helper drm_kms_helper snd_seq_device snd_timer drm snd
fb_sys_fops syscopyarea sysfillrect sysimgblt soundcore ccp k10temp
wmi mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables
x_tables autofs4 hid_generic usbhid hid igb nvme i2c_piix4
i2c_algo_bit dca nvme_core ahci libahci gpio_amdpt gpio_generic [
364.475824] ---[ end trace 8d9af36c08ebfc41 ]--- [ 364.475827] RIP:
0010:kgdb_breakpoint+0x14/0x20 [ 364.475828] Code: ea ff ff ff c3 90
0f 1f 44 00 00 55 31 c0 48 89 e5 5d c3 0f 1f 00 0f 1f 44 00 00 55 48
89 e5 f0 ff 05 68 7f 88 01 0f ae f8 cc <0f> ae f8 f0 ff 0d 5a 7f 88 01
5d c3 0f 1f 44 00 00 55 48 89 e5 e8 [ 364.475851] RSP:
0018:ffffb8018d6d7b78 EFLAGS: 00000202 [ 364.475853] RAX:
0000000000000000 RBX: ffff9ea7f8d98d00 RCX: 0000000000000037 [
364.475854] RDX: 0000000000000000 RSI: 0000000000000003 RDI:
ffff9ea7f8d983c0 [ 364.475856] RBP: ffffb8018d6d7b78 R08:
0000000000000000 R09: 0000000000000000 [ 364.475857] R10:
0000000000000da0 R11: 0000000000000000 R12: 0000000000000003 [
364.475859] R13: 0000000000000000 R14: 0000000000000000 R15:
ffffb8018d6d7d50 [ 364.475861] FS: 00007fbdbd2c7b80(0000)
GS:ffff9ea81ef00000(0000) knlGS:0000000000000000 [ 364.475862] CS:
0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 364.475864] CR2:
000055c07fcdde78 CR3: 000000069add2000 CR4: 00000000003406e0 |
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Here you go! |
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No, my displays both have their own DP connection. I'm using a Radeon RX 580 series card. It's got 2x DP and 2x HDMI outputs. |
|
Kernel updated to 4.20.17. Still an issue. This time I tried to set the brightness of both monitors at the same time. The first time, the first one ran and the second one hung. Then both hung. Looks like it failed at the exact same spot. |
|
Nick,
I'm afraid everything looks quite in order. DisplayPort Multi-Stream
Transport and docking stations are common problem areas for drivers, but
neither of those apply to you. So my suggestion remains to report the
problem to the amdgpu folks.
Regards,
Sanford
…On 7/2/19 12:25 PM, Nick Vahalik wrote:
Here you go!
interrogate-output.txt
<https://github.com/rockowitz/ddcutil/files/3350993/interrogate-output.txt>
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When you say "at the same time", any chance you were executing 2
instances of ddcutil in parallel?
If you are executing ddcutil sequentially, what happens if you insert a
sleep between the 2 calls?
Sanford
…On 7/3/19 2:47 PM, Nick Vahalik wrote:
Kernel updated to 4.20.17. Still an issue. This time I tried to set
the brightness of both monitors at the same time. The first time, the
first one ran and the second one hung. Then both hung.
Looks like it failed at the exact same spot.
|[ 1290.270967] WARNING: CPU: 11 PID: 13323 at
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/gpio_base.c:64
dal_gpio_open_ex+0x29/0x40 [amdgpu] [ 1290.270968] Modules linked in:
i2c_dev uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2
videobuf2_common videodev media edac_mce_amd kvm_amd kvm irqbypass
snd_hda_codec_realtek nls_iso8859_1 amdgpu snd_hda_codec_generic
snd_hda_codec_hdmi snd_hda_intel crct10dif_pclmul snd_hda_codec
snd_usb_audio snd_hda_core snd_usbmidi_lib crc32_pclmul snd_hwdep
chash ghash_clmulni_intel amd_iommu_v2 snd_pcm gpu_sched snd_seq_dummy
ttm snd_seq_oss snd_seq_midi drm_kms_helper snd_seq_midi_event
snd_rawmidi drm snd_seq drm_panel_orientation_quirks cfbfillrect
cfbimgblt snd_seq_device aesni_intel snd_timer cfbcopyarea eeepc_wmi
fb_sys_fops syscopyarea asus_wmi aes_x86_64 snd sysfillrect
crypto_simd sparse_keymap input_leds joydev sysimgblt cryptd
glue_helper mxm_wmi video wmi_bmof soundcore ccp k10temp fb fbdev
mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables
autofs4 hid_generic usbhid hid igb i2c_algo_bit i2c_piix4 dca nvme
i2c_core ahci nvme_core libahci gpio_amdpt wmi [ 1290.271002]
gpio_generic [ 1290.271005] CPU: 11 PID: 13323 Comm: ddcutil Not
tainted 4.20.17-042017-generic #201903190933 [ 1290.271006] Hardware
name: System manufacturer System Product Name/PRIME X470-PRO, BIOS
4207 12/07/2018 [ 1290.271075] RIP: 0010:dal_gpio_open_ex+0x29/0x40
[amdgpu] [ 1290.271076] Code: 00 0f 1f 44 00 00 55 48 83 7f 08 00 48
89 e5 75 19 89 77 18 8b 57 14 4c 8d 47 08 89 f1 8b 77 10 48 8b 3f e8
f9 04 00 00 5d c3 <0f> 0b e8 e0 1a 87 c3 b8 05 00 00 00 5d c3 66 0f 1f
84 00 00 00 00 [ 1290.271077] RSP: 0018:ffffb2af4fe83b70 EFLAGS:
00010286 [ 1290.271079] RAX: 0000000000000000 RBX: ffff920037f87380
RCX: 0000000000000000 [ 1290.271080] RDX: 0000000000000000 RSI:
0000000000000003 RDI: ffff920037f87ca0 [ 1290.271080] RBP:
ffffb2af4fe83b70 R08: 0000000000000000 R09: 0000000000000001 [
1290.271081] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000003 [ 1290.271082] R13: 0000000000000000 R14:
0000000000000001 R15: 0000000000000030 [ 1290.271083] FS:
00007fd33ac28b80(0000) GS:ffff92003ecc0000(0000)
knlGS:0000000000000000 [ 1290.271084] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033 [ 1290.271085] CR2: 00007f762abaa040 CR3:
000000063cfe0000 CR4: 00000000003406e0 [ 1290.271085] Call Trace: [
1290.271155] dal_ddc_open+0x32/0xe0 [amdgpu] [ 1290.271224]
acquire+0x3b/0x80 [amdgpu] [ 1290.271286]
dc_link_aux_transfer+0x98/0x150 [amdgpu] [ 1290.271355]
dm_dp_aux_transfer+0x9f/0x130 [amdgpu] [ 1290.271361]
drm_dp_i2c_do_msg+0x8b/0x290 [drm_kms_helper] [ 1290.271367]
drm_dp_i2c_xfer+0xc4/0x250 [drm_kms_helper] [ 1290.271372]
__i2c_transfer+0x14a/0x450 [i2c_core] [ 1290.271376] ?
_cond_resched+0x19/0x30 [ 1290.271379] i2c_transfer+0x5a/0xd0
[i2c_core] [ 1290.271383] i2c_transfer_buffer_flags+0x4d/0x70
[i2c_core] [ 1290.271386] i2cdev_write+0x56/0xa0 [i2c_dev] [
1290.271389] __vfs_write+0x3a/0x190 [ 1290.271391] ?
apparmor_file_permission+0x1a/0x20 [ 1290.271394] ?
security_file_permission+0x31/0xc0 [ 1290.271396] vfs_write+0xab/0x1b0
[ 1290.271397] ksys_write+0x55/0xc0 [ 1290.271399]
__x64_sys_write+0x1a/0x20 [ 1290.271402] do_syscall_64+0x5a/0x110 [
1290.271404] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1290.271405]
RIP: 0033:0x7fd3398a7154 [ 1290.271407] Code: 89 02 48 c7 c0 ff ff ff
ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8d 05 b1 07 2e 00 8b 00
85 c0 75 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 f3 c3 66 90
41 54 55 49 89 d4 53 48 89 f5 [ 1290.271407] RSP:
002b:00007ffee3079758 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [
1290.271409] RAX: ffffffffffffffda RBX: 0000000000000001 RCX:
00007fd3398a7154 [ 1290.271409] RDX: 0000000000000001 RSI:
00007ffee30797b7 RDI: 0000000000000003 [ 1290.271410] RBP:
00007ffee30797b7 R08: 00007ffee31480a0 R09: 00007ffee3148080 [
1290.271411] R10: 000000000008bdb0 R11: 0000000000000246 R12:
15adf9c617cac805 [ 1290.271411] R13: 0000000000000003 R14:
0000000000000000 R15: 000055d724af4b88 [ 1290.271413] ---[ end trace
b558afb76afe3f3f ]--- [ 1290.271420] int3: 0000 [#1] SMP NOPTI [
1290.271424] CPU: 11 PID: 13323 Comm: ddcutil Tainted: G W
4.20.17-042017-generic #201903190933 [ 1290.271425] Hardware name:
System manufacturer System Product Name/PRIME X470-PRO, BIOS 4207
12/07/2018 [ 1290.271429] RIP: 0010:kgdb_breakpoint+0x14/0x20 [
1290.271431] Code: 00 5d c3 0f 1f 00 0f 1f 44 00 00 55 31 c0 48 89 e5
5d c3 0f 1f 00 0f 1f 44 00 00 55 48 89 e5 f0 ff 05 18 fb 61 01 0f ae
f8 cc <0f> ae f8 f0 ff 0d 0a fb 61 01 5d c3 0f 1f 44 00 00 55 48 89 e5
e8 [ 1290.271432] RSP: 0018:ffffb2af4fe83b60 EFLAGS: 00000202 [
1290.271434] RAX: 0000000000000000 RBX: ffff920037f87380 RCX:
0000000000000000 [ 1290.271435] RDX: 0000000000000000 RSI:
0000000000000003 RDI: ffff920037f87ca0 [ 1290.271436] RBP:
ffffb2af4fe83b60 R08: 0000000000000000 R09: 0000000000000001 [
1290.271437] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000003 [ 1290.271438] R13: 0000000000000000 R14:
0000000000000001 R15: 0000000000000030 [ 1290.271440] FS:
00007fd33ac28b80(0000) GS:ffff92003ecc0000(0000)
knlGS:0000000000000000 [ 1290.271441] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033 [ 1290.271443] CR2: 00007f762abaa040 CR3:
000000063cfe0000 CR4: 00000000003406e0 [ 1290.271444] Call Trace: [
1290.271512] dal_gpio_open_ex+0x30/0x40 [amdgpu] [ 1290.271580]
dal_ddc_open+0x32/0xe0 [amdgpu] [ 1290.271650] acquire+0x3b/0x80
[amdgpu] [ 1290.271706] dc_link_aux_transfer+0x98/0x150 [amdgpu] [
1290.271767] dm_dp_aux_transfer+0x9f/0x130 [amdgpu] [ 1290.271773]
drm_dp_i2c_do_msg+0x8b/0x290 [drm_kms_helper] [ 1290.271779]
drm_dp_i2c_xfer+0xc4/0x250 [drm_kms_helper] [ 1290.271784]
__i2c_transfer+0x14a/0x450 [i2c_core] [ 1290.271785] ?
_cond_resched+0x19/0x30 [ 1290.271789] i2c_transfer+0x5a/0xd0
[i2c_core] [ 1290.271793] i2c_transfer_buffer_flags+0x4d/0x70
[i2c_core] [ 1290.271795] i2cdev_write+0x56/0xa0 [i2c_dev] [
1290.271798] __vfs_write+0x3a/0x190 [ 1290.271799] ?
apparmor_file_permission+0x1a/0x20 [ 1290.271801] ?
security_file_permission+0x31/0xc0 [ 1290.271804] vfs_write+0xab/0x1b0
[ 1290.271806] ksys_write+0x55/0xc0 [ 1290.271808]
__x64_sys_write+0x1a/0x20 [ 1290.271810] do_syscall_64+0x5a/0x110 [
1290.271812] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1290.271813]
RIP: 0033:0x7fd3398a7154 [ 1290.271814] Code: 89 02 48 c7 c0 ff ff ff
ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8d 05 b1 07 2e 00 8b 00
85 c0 75 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 f3 c3 66 90
41 54 55 49 89 d4 53 48 89 f5 [ 1290.271816] RSP:
002b:00007ffee3079758 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [
1290.271817] RAX: ffffffffffffffda RBX: 0000000000000001 RCX:
00007fd3398a7154 [ 1290.271818] RDX: 0000000000000001 RSI:
00007ffee30797b7 RDI: 0000000000000003 [ 1290.271819] RBP:
00007ffee30797b7 R08: 00007ffee31480a0 R09: 00007ffee3148080 [
1290.271820] R10: 000000000008bdb0 R11: 0000000000000246 R12:
15adf9c617cac805 [ 1290.271821] R13: 0000000000000003 R14:
0000000000000000 R15: 000055d724af4b88 [ 1290.271823] Modules linked
in: i2c_dev uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2
videobuf2_common videodev media edac_mce_amd kvm_amd kvm irqbypass
snd_hda_codec_realtek nls_iso8859_1 amdgpu snd_hda_codec_generic
snd_hda_codec_hdmi snd_hda_intel crct10dif_pclmul snd_hda_codec
snd_usb_audio snd_hda_core snd_usbmidi_lib crc32_pclmul snd_hwdep
chash ghash_clmulni_intel amd_iommu_v2 snd_pcm gpu_sched snd_seq_dummy
ttm snd_seq_oss snd_seq_midi drm_kms_helper snd_seq_midi_event
snd_rawmidi drm snd_seq drm_panel_orientation_quirks cfbfillrect
cfbimgblt snd_seq_device aesni_intel snd_timer cfbcopyarea eeepc_wmi
fb_sys_fops syscopyarea asus_wmi aes_x86_64 snd sysfillrect
crypto_simd sparse_keymap input_leds joydev sysimgblt cryptd
glue_helper mxm_wmi video wmi_bmof soundcore ccp k10temp fb fbdev
mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables
autofs4 hid_generic usbhid hid igb i2c_algo_bit i2c_piix4 dca nvme
i2c_core ahci nvme_core libahci gpio_amdpt wmi [ 1290.271840]
gpio_generic [ 1290.271844] ---[ end trace b558afb76afe3f40 ]--- [
1290.271846] RIP: 0010:kgdb_breakpoint+0x14/0x20 [ 1290.271848] Code:
00 5d c3 0f 1f 00 0f 1f 44 00 00 55 31 c0 48 89 e5 5d c3 0f 1f 00 0f
1f 44 00 00 55 48 89 e5 f0 ff 05 18 fb 61 01 0f ae f8 cc <0f> ae f8 f0
ff 0d 0a fb 61 01 5d c3 0f 1f 44 00 00 55 48 89 e5 e8 [ 1290.271849]
RSP: 0018:ffffb2af4fe83b60 EFLAGS: 00000202 [ 1290.271850] RAX:
0000000000000000 RBX: ffff920037f87380 RCX: 0000000000000000 [
1290.271851] RDX: 0000000000000000 RSI: 0000000000000003 RDI:
ffff920037f87ca0 [ 1290.271852] RBP: ffffb2af4fe83b60 R08:
0000000000000000 R09: 0000000000000001 [ 1290.271853] R10:
0000000000000000 R11: 0000000000000000 R12: 0000000000000003 [
1290.271854] R13: 0000000000000000 R14: 0000000000000001 R15:
0000000000000030 [ 1290.271855] FS: 00007fd33ac28b80(0000)
GS:ffff92003ecc0000(0000) knlGS:0000000000000000 [ 1290.271857] CS:
0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1290.271858] CR2:
00007f762abaa040 CR3: 000000063cfe0000 CR4: 00000000003406e0 [
1290.272193] WARNING: CPU: 11 PID: 0 at kernel/rcu/tree.c:574
rcu_idle_enter+0x83/0x90 [ 1290.272195] Modules linked in: i2c_dev
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2
videobuf2_common videodev media edac_mce_amd kvm_amd kvm irqbypass
snd_hda_codec_realtek nls_iso8859_1 amdgpu snd_hda_codec_generic
snd_hda_codec_hdmi snd_hda_intel crct10dif_pclmul snd_hda_codec
snd_usb_audio snd_hda_core snd_usbmidi_lib crc32_pclmul snd_hwdep
chash ghash_clmulni_intel amd_iommu_v2 snd_pcm gpu_sched snd_seq_dummy
ttm snd_seq_oss snd_seq_midi drm_kms_helper snd_seq_midi_event
snd_rawmidi drm snd_seq drm_panel_orientation_quirks cfbfillrect
cfbimgblt snd_seq_device aesni_intel snd_timer cfbcopyarea eeepc_wmi
fb_sys_fops syscopyarea asus_wmi aes_x86_64 snd sysfillrect
crypto_simd sparse_keymap input_leds joydev sysimgblt cryptd
glue_helper mxm_wmi video wmi_bmof soundcore ccp k10temp fb fbdev
mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables
autofs4 hid_generic usbhid hid igb i2c_algo_bit i2c_piix4 dca nvme
i2c_core ahci nvme_core libahci gpio_amdpt wmi [ 1290.272217]
gpio_generic [ 1290.272222] CPU: 11 PID: 0 Comm: swapper/11 Tainted: G
D W 4.20.17-042017-generic #201903190933 [ 1290.272223] Hardware name:
System manufacturer System Product Name/PRIME X470-PRO, BIOS 4207
12/07/2018 [ 1290.272226] RIP: 0010:rcu_idle_enter+0x83/0x90 [
1290.272227] Code: 05 1a de cf 7b 48 c7 80 a8 00 00 00 00 00 00 00 48
89 d0 65 48 03 05 04 de cf 7b ba 02 00 00 00 f0 0f c1 90 b8 00 00 00
5d c3 <0f> 0b eb a7 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 c7
c0 [ 1290.272229] RSP: 0018:ffffb2af4329bec0 EFLAGS: 00010002 [
1290.272230] RAX: ffff92003ece3980 RBX: 000000000000000b RCX:
4000000000000000 [ 1290.272232] RDX: 0000000000023980 RSI:
000000000000091c RDI: ffffffff8555dc40 [ 1290.272233] RBP:
ffffb2af4329bec0 R08: 000000000000022d R09: 00000000000005b3 [
1290.272235] R10: ffff92003ece1b84 R11: ffff92003ece1b64 R12:
ffffffff8562ab60 [ 1290.272236] R13: ffff920031a62c00 R14:
ffffffff8555dc40 R15: 0000000000000002 [ 1290.272238] FS:
0000000000000000(0000) GS:ffff92003ecc0000(0000)
knlGS:0000000000000000 [ 1290.272239] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033 [ 1290.272240] CR2: 00007f762abaa040 CR3:
00000003fca0a000 CR4: 00000000003406e0 [ 1290.272242] Call Trace: [
1290.272246] do_idle+0x22c/0x280 [ 1290.272249]
cpu_startup_entry+0x1d/0x20 [ 1290.272252] start_secondary+0x1ab/0x200
[ 1290.272255] secondary_startup_64+0xa4/0xb0 [ 1290.272257] ---[ end
trace b558afb76afe3f41 ]--- |
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Correct. If I call this: The second command will hang. However, changing it to this: Has resulted in no hangs when calling the batch command. |
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I would also like to report issue when calling ddcutil too quickly. I was wondering if there is a built-in command which prevents ddcutil from running if another instance is already running. |
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When you say "issue", what precisely is the behavior you observe? What
commands are you executing? Can you send a log of the output. Also,
please run "ddcutil interrogate" and send the output as a file. Thank you.
…On 4/13/20 1:41 PM, Lomomn wrote:
I would also like to report issue when calling ddcutil too quickly. I
was wondering if there is a built-in command which prevents ddcutil
from running if another instance is already running.
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I was using Argos to write a script that sits in the Gnome Shell and would allow me to set some monitor configurations there.
After messing up on the script, I started noticing that the script stopped working and that subsequent calls to
ddcutiljust hung. Like... cannotCtrl+Cand cannotkill -9 <pid-of-hung-ddcutil>. The only thing that makes them disappear is a hard system reboot. The system will just hang if I try to reboot.Note that everything else works perfectly and this issue only surfaced after scripting calls to ddcutil. I do have two monitors, if that matters.
Here's the output from
dmesg, which appears to be relevant.The text was updated successfully, but these errors were encountered: