I've seen this on 5.19.9 as well (not Ubuntu, NixOS 22.05). I thought it's interesting as well.
My setup is a Logitech BRIO camera connected to a USB3 hub, connected to a LG display, connected via USB-C to my laptop. The issue happened (I think) when plugging in the camera into the USB hub. [91105.117569] usb 3-6.1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [91105.117574] usb 3-6.1.3: Product: USB-Serial Controller D [91105.117576] usb 3-6.1.3: Manufacturer: Prolific Technology Inc. [91105.126255] pl2303 3-6.1.3:1.0: pl2303 converter detected [91105.127474] usb 3-6.1.3: pl2303 converter now attached to ttyUSB0 [91108.797780] BUG: kernel NULL pointer dereference, address: 0000000000000000 [91108.797787] #PF: supervisor read access in kernel mode [91108.797790] #PF: error_code(0x0000) - not-present page [91108.797793] PGD 0 P4D 0 [91108.797797] Oops: 0000 [#1] PREEMPT SMP NOPTI [91108.797801] CPU: 6 PID: 80084 Comm: ThreadPoolSingl Tainted: G O 5.19.9 #1-NixOS [91108.797806] Hardware name: TUXEDO TUXEDO Book XP14 Gen12/NV4XMB,ME,MZ, BIOS 1.07.14RTR1 08/24/2021 [91108.797808] RIP: 0010:usb_ifnum_to_if+0x3a/0x60 [usbcore] [91108.797824] Code: 34 41 0f b6 50 04 84 d2 74 33 83 ea 01 49 8d 80 98 00 00 00 49 8d 8c d0 a0 00 00 00 eb 09 48 83 c0 08 48 39 c8 74 16 4c 8b 00 <49> 8b 10 0f b6 52 02 39 f2 75 e9 4c 89 c0 c3 cc cc cc cc 45 31 c0 [91108.797826] RSP: 0018:ffffa54807acfbb0 EFLAGS: 00010206 [91108.797829] RAX: ffff92881be64c98 RBX: 0000000000000000 RCX: ffff92881be64cc8 [91108.797831] RDX: 0000000000000005 RSI: 0000000000000001 RDI: ffff9287d09c9000 [91108.797832] RBP: ffff92881be66920 R08: 0000000000000000 R09: 000000008015000c [91108.797834] R10: 0000000000000000 R11: 0000000000000000 R12: ffff92881be62c00 [91108.797835] R13: ffff92881be66920 R14: ffff9287d09c9000 R15: ffff9287c4ebe000 [91108.797836] FS: 00007f444d99f640(0000) GS:ffff928f51580000(0000) knlGS:0000000000000000 [91108.797838] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [91108.797840] CR2: 0000000000000000 CR3: 000000040ecc2005 CR4: 0000000000770ee0 [91108.797842] PKRU: 55555554 [91108.797843] Call Trace: [91108.797845] <TASK> [91108.797847] usb_hcd_alloc_bandwidth+0x245/0x370 [usbcore] [91108.797862] usb_set_interface+0x127/0x360 [usbcore] [91108.797877] uvc_video_start_transfer+0x181/0x4d0 [uvcvideo] [91108.797883] uvc_video_start_streaming+0x7f/0xe0 [uvcvideo] [91108.797889] uvc_start_streaming+0x2d/0xe0 [uvcvideo] [91108.797895] vb2_start_streaming+0x60/0x100 [videobuf2_common] [91108.797901] vb2_core_streamon+0x5c/0xd0 [videobuf2_common] [91108.797905] uvc_queue_streamon+0x2a/0x50 [uvcvideo] [91108.797910] uvc_ioctl_streamon+0x3a/0x60 [uvcvideo] [91108.797915] __video_do_ioctl+0x19c/0x3f0 [videodev] [91108.797927] ? mmap_region+0x281/0x600 [91108.797933] video_usercopy+0x171/0x710 [videodev] [91108.797942] ? v4l_print_control+0x20/0x20 [videodev] [91108.797951] v4l2_ioctl+0x46/0x50 [videodev] [91108.797959] __x64_sys_ioctl+0x87/0xc0 [91108.797963] do_syscall_64+0x38/0x90 [91108.797968] entry_SYSCALL_64_after_hwframe+0x63/0xcd [91108.797972] RIP: 0033:0x7f44611e1e37 [91108.797975] Code: ff ff 48 89 d8 5b 5d 41 5c c3 66 0f 1f 84 00 00 00 00 00 48 89 e8 48 f7 d8 48 39 c3 0f 92 c0 eb c9 66 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b1 0f 0f 00 f7 d8 64 89 01 48 [91108.797977] RSP: 002b:00007f444d99df38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [91108.797980] RAX: ffffffffffffffda RBX: 0000385c0021d7d0 RCX: 00007f44611e1e37 [91108.797981] RDX: 00007f444d99dfb4 RSI: 0000000040045612 RDI: 0000000000000019 [91108.797982] RBP: 00007f444d99df70 R08: 0000000000000019 R09: 0000000000bdf000 [91108.797984] R10: 0000000000000001 R11: 0000000000000246 R12: 0000385c00353b60 [91108.797985] R13: 0000385c00353a00 R14: 00007f444d99dfb4 R15: 0000000040045612 [91108.797988] </TASK> [91108.797988] Modules linked in: snd_usb_audio snd_usbmidi_lib snd_rawmidi sd_mod uas usb_storage scsi_mod scsi_common pl2303 usbserial cdc_acm ccm rfcomm qrtr snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet snd_hda_codec_hdmi snd_sof_pci_intel_tgl snd_sof_intel_hda_common snd_soc_hdac_hda soundwire_intel soundwire_generic_allocation iwlmvm soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi soundwire_bus joydev cmac mousedev algif_hash snd_soc_core snd_hda_codec_realtek algif_skcipher af_alg snd_hda_codec_generic snd_compress iTCO_wdt ac97_bus hid_multitouch bnep cmdlinepart spi_nor ledtrig_audio mac80211 snd_pcm_dmaengine intel_rapl_msr intel_pmc_bxt mei_hdcp mei_pxp ee1004 mtd watchdog msr snd_hda_intel i2c_designware_platform pmt_telemetry snd_intel_dspcfg snd_intel_sdw_acpi i2c_designware_core pmt_class libarc4 wmi_bmof zstd intel_rapl_common zstd_compress snd_hda_codec snd_hd a_core [91108.798038] iwlwifi btusb intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp snd_hwdep coretemp iwlmei uvcvideo btrtl crc32_pclmul snd_pcm ghash_clmulni_intel videobuf2_vmalloc intel_cstate btbcm videobuf2_memops deflate intel_uncore r8169 btintel snd_timer btmtk cfg80211 videobuf2_v4l2 realtek psmouse snd mei_me i2c_i801 spi_intel_pci serio_raw efi_pstore spi_intel videobuf2_common i2c_smbus nls_iso8859_1 mdio_devres bluetooth soundcore nls_cp437 libphy videodev sch_fq_codel vfat mei ecdh_generic intel_lpss_pci fat rfkill intel_lpss uinput idma64 ecc mc ctr crc16 virt_dma ucsi_acpi loop typec_ucsi intel_vsec tap igen6_edac typec edac_core tiny_power_button macvlan roles thermal wmi button i2c_hid_acpi bridge battery i2c_hid tpm_crb stp evdev mac_hid llc tun tpm_tis tpm_tis_core intel_pmc_core ac acpi_pad pinctrl_tigerlake intel_hid clevo_acpi(O) kvm_intel zram zsmalloc kvm irqbypass tuxedo_io(O) tuxedo_keyboard(O) fuse sparse_keymap pstore configfs efivarfs ip_tables x_tabl es [91108.798097] autofs4 xfs libcrc32c crc32c_generic dm_crypt cbc encrypted_keys trusted asn1_encoder tee tpm rng_core hid_generic usbhid hid nvme rtsx_pci_sdmmc xhci_pci xhci_pci_renesas mmc_core nvme_core xhci_hcd t10_pi crc64_rocksoft input_leds crc64 led_class crc_t10dif usbcore crc32c_intel aesni_intel rtsx_pci atkbd libps2 libaes crct10dif_generic vivaldi_fmap crypto_simd crct10dif_pclmul cryptd mfd_core thunderbolt usb_common crct10dif_common i8042 rtc_cmos serio dm_mod dax i915 i2c_algo_bit intel_gtt drm_buddy cec video drm_display_helper drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm i2c_core backlight agpgart [91108.798138] CR2: 0000000000000000 [91108.798141] ---[ end trace 0000000000000000 ]--- [91109.157025] RIP: 0010:usb_ifnum_to_if+0x3a/0x60 [usbcore] [91109.157057] Code: 34 41 0f b6 50 04 84 d2 74 33 83 ea 01 49 8d 80 98 00 00 00 49 8d 8c d0 a0 00 00 00 eb 09 48 83 c0 08 48 39 c8 74 16 4c 8b 00 <49> 8b 10 0f b6 52 02 39 f2 75 e9 4c 89 c0 c3 cc cc cc cc 45 31 c0 [91109.157061] RSP: 0018:ffffa54807acfbb0 EFLAGS: 00010206 [91109.157065] RAX: ffff92881be64c98 RBX: 0000000000000000 RCX: ffff92881be64cc8 [91109.157068] RDX: 0000000000000005 RSI: 0000000000000001 RDI: ffff9287d09c9000 [91109.157070] RBP: ffff92881be66920 R08: 0000000000000000 R09: 000000008015000c [91109.157072] R10: 0000000000000000 R11: 0000000000000000 R12: ffff92881be62c00 [91109.157074] R13: ffff92881be66920 R14: ffff9287d09c9000 R15: ffff9287c4ebe000 [91109.157076] FS: 00007f444d99f640(0000) GS:ffff928f51580000(0000) knlGS:0000000000000000 [91109.157079] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [91109.157081] CR2: 0000000000000000 CR3: 000000040ecc2005 CR4: 0000000000770ee0 [91109.157084] PKRU: 55555554 [91160.087306] usb 4-1: new SuperSpeed USB device number 3 using xhci_hcd [91160.101211] usb 4-1: New USB device found, idVendor=046d, idProduct=085e, bcdDevice= 3.17 [91160.101226] usb 4-1: New USB device strings: Mfr=0, Product=2, SerialNumber=3 [91160.101229] usb 4-1: Product: Logitech BRIO [91160.101231] usb 4-1: SerialNumber: AF6E7894 [91160.103826] usb 4-1: Found UVC 1.00 device Logitech BRIO (046d:085e) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1827452 Title: null pointer dereference in uvcvideo Status in linux package in Ubuntu: Confirmed Bug description: I have a logitech c920 webcam. When using this camera in obs-studio v23.x, all of my USB devices stop working and I see the following in my kernel log: [ 590.282211] usb 3-3: new high-speed USB device number 5 using xhci_hcd [ 592.660916] usb 3-3: New USB device found, idVendor=046d, idProduct=082d, bcdDevice= 0.11 [ 592.660922] usb 3-3: New USB device strings: Mfr=0, Product=2, SerialNumber=1 [ 592.660925] usb 3-3: Product: HD Pro Webcam C920 [ 592.660928] usb 3-3: SerialNumber: 2EAD866F [ 592.664600] uvcvideo: Found UVC 1.00 device HD Pro Webcam C920 (046d:082d) [ 592.666416] uvcvideo 3-3:1.0: Entity type for entity Processing 3 was not initialized! [ 592.666421] uvcvideo 3-3:1.0: Entity type for entity Extension 6 was not initialized! [ 592.666425] uvcvideo 3-3:1.0: Entity type for entity Extension 12 was not initialized! [ 592.666428] uvcvideo 3-3:1.0: Entity type for entity Camera 1 was not initialized! [ 592.666430] uvcvideo 3-3:1.0: Entity type for entity Extension 8 was not initialized! [ 592.666433] uvcvideo 3-3:1.0: Entity type for entity Extension 9 was not initialized! [ 592.666436] uvcvideo 3-3:1.0: Entity type for entity Extension 10 was not initialized! [ 592.666439] uvcvideo 3-3:1.0: Entity type for entity Extension 11 was not initialized! [ 592.666622] input: HD Pro Webcam C920 as /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/input/input23 [ 748.490453] usb 3-3: reset high-speed USB device number 5 using xhci_hcd [ 938.125745] usb 3-3: USB disconnect, device number 5 [ 943.298530] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 943.298533] #PF error: [normal kernel read fault] [ 943.298534] PGD 80000007ca5f3067 P4D 80000007ca5f3067 PUD 0 [ 943.298536] Oops: 0000 [#1] SMP PTI [ 943.298538] CPU: 0 PID: 9442 Comm: libobs: graphic Tainted: P OE 5.0.0-13-generic #14-Ubuntu [ 943.298539] Hardware name: Gigabyte Technology Co., Ltd. Z87-HD3/Z87-HD3, BIOS F7 01/20/2014 [ 943.298543] RIP: 0010:usb_ifnum_to_if+0x24/0x60 [ 943.298544] Code: ff c3 0f 1f 40 00 0f 1f 44 00 00 55 48 8b 87 c0 03 00 00 48 89 e5 48 85 c0 74 43 0f b6 48 04 84 c9 74 39 48 8b 90 98 00 00 00 <48> 8b 3a 0f b6 7f 02 39 fe 74 2b 48 8d 90 a0 00 00 00 8d 41 ff 48 [ 943.298545] RSP: 0018:ffffbdae493dbab0 EFLAGS: 00010202 [ 943.298547] RAX: ffffa106ae527000 RBX: ffffa1070ad0a800 RCX: 0000000000000004 [ 943.298547] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffa1070ad0a800 [ 943.298548] RBP: ffffbdae493dbab0 R08: 0000000000027040 R09: ffffffffb57825b8 [ 943.298549] R10: fffffba45fce4bc0 R11: 0000000000000001 R12: 0000000000000000 [ 943.298550] R13: ffffa10644187b98 R14: 00000000ffffff92 R15: ffffa1075131a000 [ 943.298551] FS: 00007f93c40d7700(0000) GS:ffffa1075ea00000(0000) knlGS:0000000000000000 [ 943.298552] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 943.298553] CR2: 0000000000000000 CR3: 00000006f8a94004 CR4: 00000000001606f0 [ 943.298553] Call Trace: [ 943.298557] usb_hcd_alloc_bandwidth+0x241/0x370 [ 943.298559] usb_set_interface+0xfc/0x380 [ 943.298565] uvc_video_start_transfer+0x155/0x4b0 [uvcvideo] [ 943.298568] uvc_video_start_streaming+0x7f/0xd0 [uvcvideo] [ 943.298570] uvc_start_streaming+0x28/0x70 [uvcvideo] [ 943.298573] vb2_start_streaming+0x6d/0x110 [videobuf2_common] [ 943.298575] vb2_core_streamon+0x59/0xc0 [videobuf2_common] [ 943.298578] vb2_streamon+0x18/0x30 [videobuf2_v4l2] [ 943.298580] uvc_queue_streamon+0x2e/0x50 [uvcvideo] [ 943.298582] uvc_ioctl_streamon+0x3f/0x60 [uvcvideo] [ 943.298588] v4l_streamon+0x20/0x30 [videodev] [ 943.298592] __video_do_ioctl+0x19a/0x3f0 [videodev] [ 943.298596] video_usercopy+0x1a6/0x660 [videodev] [ 943.298599] ? v4l_s_fmt+0x630/0x630 [videodev] [ 943.298603] video_ioctl2+0x15/0x20 [videodev] [ 943.298606] v4l2_ioctl+0x49/0x50 [videodev] [ 943.298608] do_vfs_ioctl+0xa9/0x640 [ 943.298610] ? __switch_to_asm+0x34/0x70 [ 943.298611] ? __switch_to_asm+0x40/0x70 [ 943.298612] ? __switch_to_asm+0x34/0x70 [ 943.298612] ? __switch_to_asm+0x40/0x70 [ 943.298613] ? __switch_to_asm+0x34/0x70 [ 943.298614] ? __switch_to_asm+0x40/0x70 [ 943.298615] ? __switch_to_asm+0x34/0x70 [ 943.298616] ? __switch_to_asm+0x40/0x70 [ 943.298617] ksys_ioctl+0x67/0x90 [ 943.298619] __x64_sys_ioctl+0x1a/0x20 [ 943.298621] do_syscall_64+0x5a/0x110 [ 943.298622] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 943.298623] RIP: 0033:0x7f9430e082e9 [ 943.298624] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 77 cb 0c 00 f7 d8 64 89 01 48 [ 943.298625] RSP: 002b:00007f93c40d6428 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 943.298626] RAX: ffffffffffffffda RBX: 00007f94000da020 RCX: 00007f9430e082e9 [ 943.298627] RDX: 00007f93c40d6444 RSI: 0000000040045612 RDI: 000000000000003b [ 943.298628] RBP: 0000000000000000 R08: 00000000c058560f R09: 000055f3e344a6e0 [ 943.298629] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000003b [ 943.298629] R13: 00007f93c40d68bc R14: 00007f94000da020 R15: 0000000000000000 [ 943.298631] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common snd_usb_audio videodev snd_usbmidi_lib media rfcomm joydev input_leds hid_generic uhid hid algif_hash algif_skcipher af_alg nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype xt_conntrack br_netfilter veth ebtable_filter ebtables ip6t_MASQUERADE ip6table_nat nf_nat_ipv6 ip6table_filter ip6_tables ipt_MASQUERADE xt_CHECKSUM xt_comment xt_tcpudp iptable_nat nf_nat_ipv4 nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_filter bpfilter bridge stp llc aufs overlay pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) cmac bnep vboxdrv(OE) binfmt_misc nvidia_uvm(OE) nls_iso8859_1 intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm irqbypass snd_hda_codec_hdmi crct10dif_pclmul crc32_pclmul ghash_clmulni_intel nvidia_drm(POE) nvidia_modeset(POE) arc4 btusb btrtl btbcm btintel nvidia(POE) snd_hda_codec_realtek bluetooth aesni_intel [ 943.298652] snd_hda_codec_generic ledtrig_audio aes_x86_64 snd_hda_intel crypto_simd snd_hda_codec cryptd ecdh_generic glue_helper iwlmvm snd_hda_core mac80211 snd_hwdep snd_pcm intel_cstate intel_rapl_perf snd_seq_midi snd_seq_midi_event snd_rawmidi iwlwifi drm_kms_helper drm snd_seq ipmi_devintf ipmi_msghandler fb_sys_fops syscopyarea snd_seq_device sysfillrect cfg80211 snd_timer sysimgblt snd soundcore mei_me mei mac_hid sch_fq_codel it87 hwmon_vid coretemp parport_pc ppdev lp parport ip_tables x_tables autofs4 xfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear dm_mirror dm_region_hash dm_log i2c_i801 ahci lpc_ich libahci r8169 realtek video [ 943.298672] CR2: 0000000000000000 [ 943.298674] ---[ end trace 62d503b51a37a64a ]--- [ 943.298675] RIP: 0010:usb_ifnum_to_if+0x24/0x60 [ 943.298676] Code: ff c3 0f 1f 40 00 0f 1f 44 00 00 55 48 8b 87 c0 03 00 00 48 89 e5 48 85 c0 74 43 0f b6 48 04 84 c9 74 39 48 8b 90 98 00 00 00 <48> 8b 3a 0f b6 7f 02 39 fe 74 2b 48 8d 90 a0 00 00 00 8d 41 ff 48 [ 943.298677] RSP: 0018:ffffbdae493dbab0 EFLAGS: 00010202 [ 943.298678] RAX: ffffa106ae527000 RBX: ffffa1070ad0a800 RCX: 0000000000000004 [ 943.298679] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffa1070ad0a800 [ 943.298680] RBP: ffffbdae493dbab0 R08: 0000000000027040 R09: ffffffffb57825b8 [ 943.298680] R10: fffffba45fce4bc0 R11: 0000000000000001 R12: 0000000000000000 [ 943.298681] R13: ffffa10644187b98 R14: 00000000ffffff92 R15: ffffa1075131a000 [ 943.298682] FS: 00007f93c40d7700(0000) GS:ffffa1075ea00000(0000) knlGS:0000000000000000 [ 943.298683] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 943.298684] CR2: 0000000000000000 CR3: 00000006f8a94004 CR4: 00000000001606f0 Interestingly, this doesn't crash the machine, but it does seem to crash udev or whatever is responsible for updating USB device state, as I've disconnected the webcam but running lsusb still shows it as connected. This is something of a pain as the only way I could file this report was to ssh in from another machine with X forwarding enabled, as my keyboard and mouse no longer function. Note that sometimes OBS will work fine with this camera, however this bug will still occur when I attempt to change the camera resolution. ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: linux-modules-extra-5.0.0-13-generic 5.0.0-13.14 ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6 Uname: Linux 5.0.0-13-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.10-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: bburns 3961 F.... pulseaudio /dev/snd/pcmC1D7p: bburns 3961 F...m pulseaudio /dev/snd/controlC0: bburns 3961 F.... pulseaudio /dev/snd/pcmC0D1c: bburns 3961 F...m pulseaudio Date: Thu May 2 18:47:59 2019 HibernationDevice: RESUME=none InstallationDate: Installed on 2018-07-30 (276 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: Gigabyte Technology Co., Ltd. Z87-HD3 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.0.0-13-generic root=/dev/mapper/cl_box-root ro RelatedPackageVersions: linux-restricted-modules-5.0.0-13-generic N/A linux-backports-modules-5.0.0-13-generic N/A linux-firmware 1.178 SourcePackage: linux UpgradeStatus: Upgraded to disco on 2019-04-24 (8 days ago) dmi.bios.date: 01/20/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F7 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z87-HD3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: To be filled by O.E.M. dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF7:bd01/20/2014:svnGigabyteTechnologyCo.,Ltd.:pnZ87-HD3:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ87-HD3:rvrTobefilledbyO.E.M.:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: Z87-HD3 dmi.product.sku: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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