Hi Mike, Em Sun, 6 Jan 2019 01:05:16 +0500 Mikhail Gavrilov <mikhail.v.gavrilov@xxxxxxxxx> escreveu: > Hi folks! > Every time when I start capture video from external capture card > Avermedia Live Gamer ULTRA GC553 > (https://www.avermedia.com/gaming/product/game_capture/live_gamer_ultra_gc553) What's the driver used by this device? A quick browsing at the Avermedia page you pointed, it indicates that this should be using the UVC driver: "The LGU takes full advantage of UVC technology, which basically standardizes video drivers across Windows and Mac. In other words, all you need to do is plug your LGU to your PC or Mac and it’s ready to record and stream." So, I *suspect* that it uses the uvcvideo driver, but better to double check. > I got kernel error "Unknown pixelformat 0x00000000". > It look like false positive because I am able record video with OBS in > 4K resolution from another Linux machine or PS 4 Pro if I select > video format "Planar YVU 4:2:0" or "YU12 (Emulated)" > But very unpleasant to see this error in kernel log. > > $ uname -r > 4.20.0-1.fc30.x86_64 > > $ lsusb > Bus 004 Device 007: ID 07ca:0553 AVerMedia Technologies, Inc. > > > [ 75.985776] ------------[ cut here ]------------ > [ 75.985780] Unknown pixelformat 0x00000000 > [ 75.985813] WARNING: CPU: 12 PID: 3175 at > drivers/media/v4l2-core/v4l2-ioctl.c:1342 v4l_enum_fmt+0xfc0/0x1380 > [videodev] > [ 75.985814] Modules linked in: nls_utf8 isofs fuse rfcomm > xt_CHECKSUM ipt_MASQUERADE tun bridge stp llc devlink > nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_rpfilter > ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ip6table_nat > nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat > nf_nat_ipv4 nf_nat iptable_mangle iptable_raw iptable_security > nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nfnetlink > ebtable_filter ebtables ip6table_filter ip6_tables cmac bnep sunrpc > xfs vfat fat libcrc32c edac_mce_amd arc4 kvm_amd kvm r8822be(C) > snd_hda_codec_realtek snd_hda_codec_generic irqbypass > snd_hda_codec_hdmi snd_hda_intel snd_hda_codec mac80211 snd_usb_audio > crct10dif_pclmul snd_hda_core snd_usbmidi_lib crc32_pclmul snd_hwdep > snd_rawmidi snd_seq snd_seq_device uvcvideo snd_pcm > ghash_clmulni_intel btusb videobuf2_vmalloc videobuf2_memops btrtl > videobuf2_v4l2 btbcm eeepc_wmi videobuf2_common btintel asus_wmi > sparse_keymap bluetooth video videodev wmi_bmof joydev > [ 75.985838] snd_timer cfg80211 media k10temp snd sp5100_tco > i2c_piix4 soundcore ecdh_generic ccp rfkill pcc_cpufreq gpio_amdpt > gpio_generic acpi_cpufreq binfmt_misc uas usb_storage hid_sony > ff_memless amdgpu hid_logitech_hidpp chash amd_iommu_v2 gpu_sched > drm_kms_helper ttm drm igb crc32c_intel hid_logitech_dj dca nvme > i2c_algo_bit nvme_core wmi pinctrl_amd > [ 75.985854] CPU: 12 PID: 3175 Comm: obs Tainted: G C > 4.20.0-1.fc30.x86_64 #1 > [ 75.985856] Hardware name: System manufacturer System Product > Name/ROG STRIX X470-I GAMING, BIOS 1103 11/16/2018 > [ 75.985862] RIP: 0010:v4l_enum_fmt+0xfc0/0x1380 [videodev] > [ 75.985863] Code: c6 4b 79 b5 c0 e9 55 f1 ff ff 48 c7 c6 09 7c b5 > c0 3d 56 50 38 30 0f 84 43 f1 ff ff 89 c6 48 c7 c7 1c 7d b5 c0 e8 3a > 3b 57 f9 <0f> 0b 41 80 7c 24 0c 00 0f 85 45 f1 ff ff 41 8b 44 24 2c 49 > 8d 7c > [ 75.985865] RSP: 0018:ffffa52889277cb8 EFLAGS: 00010286 > [ 75.985867] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000006 > [ 75.985868] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff964cbeb168c0 > [ 75.985869] RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000007 > [ 75.985870] R10: 0000000000000000 R11: ffffffffbb99e22d R12: ffffa52889277dc0 > [ 75.985872] R13: ffffffffc05079e0 R14: ffff964c8a790600 R15: ffffffffffffffed > [ 75.985873] FS: 00007f0c1eab1f00(0000) GS:ffff964cbeb00000(0000) > knlGS:0000000000000000 > [ 75.985875] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 75.985876] CR2: 00007f0c08197294 CR3: 000000078795e000 CR4: 00000000003406e0 > [ 75.985877] Call Trace: > [ 75.985885] __video_do_ioctl+0x174/0x3b0 [videodev] > [ 75.985889] ? page_add_file_rmap+0xa0/0x2d0 > [ 75.985892] ? alloc_set_pte+0x293/0x660 > [ 75.985897] video_usercopy+0x253/0x5a0 [videodev] > [ 75.985903] ? copy_overflow+0x20/0x20 [videodev] > [ 75.985906] ? selinux_file_ioctl+0x161/0x200 > [ 75.985911] v4l2_ioctl+0x45/0x50 [videodev] > [ 75.985914] do_vfs_ioctl+0xa4/0x630 > [ 75.985916] ksys_ioctl+0x60/0x90 > [ 75.985918] __x64_sys_ioctl+0x16/0x20 > [ 75.985921] do_syscall_64+0x5b/0x160 > [ 75.985924] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > [ 75.985926] RIP: 0033:0x7f0c2454014d > [ 75.985928] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e > fa 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 0b 5d 0c 00 f7 d8 64 89 > 01 48 > [ 75.985929] RSP: 002b:00007ffe01cdc5f8 EFLAGS: 00000246 ORIG_RAX: > 0000000000000010 > [ 75.985931] RAX: ffffffffffffffda RBX: 00007f0c08197280 RCX: 00007f0c2454014d > [ 75.985932] RDX: 00007ffe01cdc660 RSI: 00000000c0405602 RDI: 0000000000000027 > [ 75.985933] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 > [ 75.985934] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007 > [ 75.985935] R13: 0000000000000001 R14: 00007ffe01cdc630 R15: 000055a982fdf6e0 > [ 75.985937] ---[ end trace 26d01f03c564a254 ]--- > > > Is it possible to fix this error? I suspect that the UVC descriptors are pointing to another format that the driver currently doesn't recognize, but I would be expecting to see some message with: Unknown video format xxxxxxx printed as well, if this is, indeed, using the uvcdriver. Regards, Mauro Thanks, Mauro
