- Posts: 2
- Joined: Thu Feb 25, 2021 1:10 pm
- Real Name: Sebastian Bodenstedt
Thu Mar 04, 2021 2:11 pm
Dear all,
I am trying to capture camera frames using a Decklink Intensity Pro 4k on a computer running the Ubuntu 20.04 Real-time (low latency) kernel (5.4.47-rt28). Here I am using the current blackmagic driver (downloaded and installed today).
Everytime I run my standard sanity check with MediaExpress, the driver crashes though, with the following error log in dmesg:
Interestingly, the 7 or so year old Intensity Pro (duo I think?) that I had previously in the machine worked with the same configuration. Does anyone have any experiences getting this to work or can help me in any way? The card itself works, I have tested it in a machine with a vanila kernel. Sadly I need the RT kernel for a robotic application.
Thank you for your help!
Best,
Sebastian
I am trying to capture camera frames using a Decklink Intensity Pro 4k on a computer running the Ubuntu 20.04 Real-time (low latency) kernel (5.4.47-rt28). Here I am using the current blackmagic driver (downloaded and installed today).
Everytime I run my standard sanity check with MediaExpress, the driver crashes though, with the following error log in dmesg:
- Code: Select all
[ 139.712109] BUG: kernel NULL pointer dereference, address: 0000000000000018
[ 139.712111] #PF: supervisor write access in kernel mode
[ 139.712112] #PF: error_code(0x0002) - not-present page
[ 139.712113] PGD 0 P4D 0
[ 139.712113] Oops: 0002 [#1] PREEMPT_RT SMP PTI
[ 139.712114] CPU: 0 PID: 565 Comm: blackmagic Tainted: P OE 5.4.47-rt28 #1
[ 139.712115] Hardware name: Hyrican Informationssysteme AG Z270 PC MATE/Z270 PC MATE (MS-7A72), BIOS 1.03 03/24/2017
[ 139.712116] RIP: 0010:rt_spin_lock+0x2b/0x50
[ 139.712118] Code: 1f 44 00 00 55 48 89 e5 41 54 49 89 fc 53 65 48 8b 1c 25 40 6c 01 00 83 83 cc 07 00 00 01 e8 0c 4a 63 ff e8 37 d0 5d ff 31 c0 <f0> 49 0f b1 5c 24 18 48 85 c0 75 05 5b 41 5c 5d c3 4c 89 e7 e8 8c
[ 139.712119] RSP: 0018:ffffb121411f3c80 EFLAGS: 00010246
[ 139.712120] RAX: 0000000000000000 RBX: ffff89803c3aa7c0 RCX: 00000000ffffffff
[ 139.712121] RDX: 0000000000000001 RSI: ffffb121411f3cc8 RDI: 0000000000000000
[ 139.712121] RBP: ffffb121411f3c90 R08: 0000000000000000 R09: 0000000000000000
[ 139.712121] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 139.712122] R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
[ 139.712122] FS: 0000000000000000(0000) GS:ffff89804ea00000(0000) knlGS:0000000000000000
[ 139.712122] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 139.712123] CR2: 0000000000000018 CR3: 000000041380e001 CR4: 00000000003606f0
[ 139.712123] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 139.712124] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 139.712124] Call Trace:
[ 139.712127] bm_spin_lock_irqsave+0x15/0x20 [blackmagic_io]
[ 139.712144] bmio_notify_add+0x6c/0xa4 [blackmagic_io]
[ 139.712153] bmio_client_notify+0x18/0x40 [blackmagic_io]
[ 139.712161] _ZN20UserClientClassLinux19notifyClientOfEventEjjjjj+0x71/0x9a [blackmagic_io]
[ 139.712174] ? _ZN19AudioInputInterface22handlePrimaryInterruptEy+0x36/0x36 [blackmagic_io]
[ 139.712187] _ZN19VideoInputInterface19videoFrameCompletedEP10VideoFrameh+0xc2/0x13c [blackmagic_io]
[ 139.712203] _ZN19VideoInputInterface25videoFrameCompletedStaticEP8OSObjectP10VideoFrameh+0xc/0xe [blackmagic_io]
[ 139.712215] _ZN15VideoInputFrame21videoFrameDMACallbackEP8OSObjectP10DMAElementj+0x164/0x1a6 [blackmagic_io]
[ 139.712231] _ZN15VideoInputFrame27videoFrameDMACallbackStaticEP8OSObjectP10DMAElementj+0x11/0x13 [blackmagic_io]
[ 139.712243] _ZN10DMAElement14signalCallbackEj+0x53/0x88 [blackmagic_io]
[ 139.712260] ? _ZN8DMAQueue14dequeueElementEv+0x4f/0x58 [blackmagic_io]
[ 139.712277] _ZN9DMAEngine24handleSecondaryInterruptEv+0x40/0x48 [blackmagic_io]
[ 139.712293] _ZN18BlackmagicIODriver24handleSecondaryInterruptEP22IOInterruptEventSourcei+0x6f/0x682 [blackmagic_io]
[ 139.712307] _ZN33BlackmagicIOSupervisorEventSource12checkForWorkEv+0x39/0x48 [blackmagic_io]
[ 139.712322] _ZN10IOWorkLoop15runEventSourcesEv+0x53/0xa4 [blackmagic_io]
[ 139.712333] _ZN10IOWorkLoop10threadMainEv+0x21/0x5a [blackmagic_io]
[ 139.712343] ? __kthread_parkme+0x4c/0x70
[ 139.712345] _ZN10IOWorkLoop22threadMainContinuationEPS_+0xd/0x12 [blackmagic_io]
[ 139.712355] kthread+0x104/0x140
[ 139.712355] ? _ZN10IOWorkLoop9runActionEPFiP8OSObjectPvS2_S2_S2_ES1_S2_S2_S2_S2_+0x66/0x66 [blackmagic_io]
[ 139.712365] ? kthread_park+0x90/0x90
[ 139.712366] ret_from_fork+0x35/0x40
[ 139.712368] Modules linked in: xt_multiport iptable_filter bpfilter ip6table_filter ip6_tables overlay binfmt_misc intel_rapl_msr nls_iso8859_1 joydev intel_rapl_common x86_pkg_temp_thermal input_leds intel_powerclamp coretemp kvm_intel kvm intel_cstate intel_rapl_per
f intel_wmi_thunderbolt mxm_wmi serio_raw blackmagic_io(POE) snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_seq_midi snd_hda_intel snd_seq_midi_event snd_intel_nhlt snd_rawmidi mac_hid snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_pcm
acpi_pad snd_seq_device snd_timer snd soundcore mei_me mei nvidia_uvm(OE) sch_fq_codel parport_pc ppdev lp parport sunrpc ip_tables x_tables autofs4 hid_logitech_hidpp hid_logitech_dj hid_generic usbhid hid nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) crct10dif_pclmu
l crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd drm_kms_helper cryptd syscopyarea glue_helper sysfillrect nvme sysimgblt fb_sys_fops psmouse nvme_core i2c_i801 e1000e ahci drm libahci
[ 139.712389] wmi video
[ 139.712390] CR2: 0000000000000018
[ 139.712392] ---[ end trace 0000000000000002 ]---
[ 139.712392] RIP: 0010:rt_spin_lock+0x2b/0x50
[ 139.712393] Code: 1f 44 00 00 55 48 89 e5 41 54 49 89 fc 53 65 48 8b 1c 25 40 6c 01 00 83 83 cc 07 00 00 01 e8 0c 4a 63 ff e8 37 d0 5d ff 31 c0 <f0> 49 0f b1 5c 24 18 48 85 c0 75 05 5b 41 5c 5d c3 4c 89 e7 e8 8c
[ 139.712394] RSP: 0018:ffffb121411f3c80 EFLAGS: 00010246
[ 139.712394] RAX: 0000000000000000 RBX: ffff89803c3aa7c0 RCX: 00000000ffffffff
[ 139.712394] RDX: 0000000000000001 RSI: ffffb121411f3cc8 RDI: 0000000000000000
[ 139.712395] RBP: ffffb121411f3c90 R08: 0000000000000000 R09: 0000000000000000
[ 139.712395] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 139.712395] R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
[ 139.712396] FS: 0000000000000000(0000) GS:ffff89804ea00000(0000) knlGS:0000000000000000
[ 139.712396] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 139.712396] CR2: 0000000000000018 CR3: 000000041380e001 CR4: 00000000003606f0
[ 139.712397] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 139.712397] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Interestingly, the 7 or so year old Intensity Pro (duo I think?) that I had previously in the machine worked with the same configuration. Does anyone have any experiences getting this to work or can help me in any way? The card itself works, I have tested it in a machine with a vanila kernel. Sadly I need the RT kernel for a robotic application.
Thank you for your help!
Best,
Sebastian