升级到 20.04LTS 服务器后，我的 Kodicom 4400R 相机卡无法正常工作

这些卡在 16.04 服务器下工作，但该服务器死了，所以我建立了一个运行 20.04 的新机器，当我安装这些卡时，它们不起作用。

我试图用 zoneminder 查看相机，但我没有运气。为了解决这个问题，我删除了 zoneminder 中的监视器（以确保设备未被使用），下载了 v4l-utils*，构建了 v4l2grab，当我运行它时，保存的文件不包含图像。

*我克隆了 v4l-utils 存储库，cd 到 v4l-utils，检查了 v4l-utils-1.18.0（20.04LTS 使用的版本），运行 make（没有错误），cd 到 contrib/test 并运行。 /v4l2grab 不带参数。

这是自系统启动以来我第一次尝试运行 v4l2grab 时的 dmesg 输出（在启动时间和此处之间的 dmesg 中有更多内容，但我现在无法发布。

[17648.566238] ------------[ cut here ]------------
[17648.566254] WARNING: CPU: 1 PID: 2760 at drivers/media/v4l2-core/v4l2-ioctl.c:1069 v4l_querycap+0x8f/0xa0 [videodev]
[17648.566255] Modules linked in: ip6table_filter ip6_tables xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bpfilter bttv coretemp tea575x tveeprom kvm_intel videobuf_dma_sg videobuf_core kvm rc_core videodev mc input_leds wmi_bmof mei_me mei mac_hid sch_fq_codel dm_multipath msr scsi_dh_rdac scsi_dh_emc scsi_dh_alua ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic i915 gpio_ich i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops usbhid lpc_ich drm e1000e pata_acpi hid ahci i2c_i801 libahci wmi video floppy
[17648.566284] CPU: 1 PID: 2760 Comm: v4l2grab Tainted: G        W         5.4.0-84-generic #94-Ubuntu
[17648.566285] Hardware name: LENOVO 7373RK3/LENOVO, BIOS 5CKT51AUS 07/23/2009
[17648.566290] RIP: 0010:v4l_querycap+0x8f/0xa0 [videodev]
[17648.566292] Code: 00 00 80 48 b9 00 00 20 00 00 00 20 00 48 0b 4b 54 21 d6 39 f2 75 13 48 89 4b 54 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b eb d0 <0f> 0b 48 89 4b 54 5b 41 5c 41 5d 41 5e 41 5f 5d c3 66 66 66 66 90
[17648.566293] RSP: 0018:ffff99b50080fc68 EFLAGS: 00010206
[17648.566294] RAX: 0000000000000000 RBX: ffff99b50080fd88 RCX: 0521000585200015
[17648.566295] RDX: 0000000085010005 RSI: 0000000085000005 RDI: ffff99b50080fdc8
[17648.566296] RBP: ffff99b50080fc90 R08: 0000000000000000 R09: 000000000000000c
[17648.566297] R10: ffff99b50080fdd8 R11: ffff99b60080fdbb R12: ffff8a8349910870
[17648.566298] R13: ffff8a834a525800 R14: ffff8a8349943800 R15: ffffffffc099a6c0
[17648.566299] FS:  00007ff4345cbb80(0000) GS:ffff8a838a300000(0000) knlGS:0000000000000000
[17648.566300] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[17648.566301] CR2: 00007ff434a5bfe0 CR3: 00000000cb400000 CR4: 00000000000406e0
[17648.566302] Call Trace:
[17648.566310]  __video_do_ioctl+0x1a7/0x410 [videodev]
[17648.566313]  ? list_lru_add+0x6c/0x1c0
[17648.566319]  ? v4l_s_fmt+0x670/0x670 [videodev]
[17648.566324]  video_usercopy+0x300/0x700 [videodev]
[17648.566327]  ? path_openat+0x140/0x290
[17648.566333]  video_ioctl2+0x15/0x20 [videodev]
[17648.566337]  v4l2_ioctl+0x4c/0x60 [videodev]
[17648.566339]  do_vfs_ioctl+0x407/0x670
[17648.566341]  ksys_ioctl+0x67/0x90
[17648.566343]  __x64_sys_ioctl+0x1a/0x20
[17648.566345]  do_syscall_64+0x57/0x190
[17648.566348]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[17648.566349] RIP: 0033:0x7ff43494a89d
[17648.566351] 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 c3 f5 0c 00 f7 d8 64 89 01 48
[17648.566352] RSP: 002b:00007ffeccf5f268 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[17648.566353] RAX: ffffffffffffffda RBX: 0000000000000280 RCX: 00007ff43494a89d
[17648.566354] RDX: 00007ffeccf5f2c0 RSI: 0000000080685600 RDI: 0000000000000003
[17648.566355] RBP: 00007ffeccf5f400 R08: 00007ffeccf5ec70 R09: 00007ffeccf5f330
[17648.566356] R10: 000000000000000a R11: 0000000000000202 R12: 0000000000000003
[17648.566357] R13: 00007ffeccf5f330 R14: 0000000000000000 R15: 0000000000000000
[17648.566358] ---[ end trace f7f2411a3d979c0f ]---
[17648.566422] ------------[ cut here ]------------
[17648.566428] WARNING: CPU: 1 PID: 2760 at drivers/media/v4l2-core/v4l2-ioctl.c:1069 v4l_querycap+0x8f/0xa0 [videodev]
[17648.566429] Modules linked in: ip6table_filter ip6_tables xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bpfilter bttv coretemp tea575x tveeprom kvm_intel videobuf_dma_sg videobuf_core kvm rc_core videodev mc input_leds wmi_bmof mei_me mei mac_hid sch_fq_codel dm_multipath msr scsi_dh_rdac scsi_dh_emc scsi_dh_alua ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic i915 gpio_ich i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops usbhid lpc_ich drm e1000e pata_acpi hid ahci i2c_i801 libahci wmi video floppy
[17648.566450] CPU: 1 PID: 2760 Comm: v4l2grab Tainted: G        W         5.4.0-84-generic #94-Ubuntu
[17648.566450] Hardware name: LENOVO 7373RK3/LENOVO, BIOS 5CKT51AUS 07/23/2009
[17648.566456] RIP: 0010:v4l_querycap+0x8f/0xa0 [videodev]
[17648.566457] Code: 00 00 80 48 b9 00 00 20 00 00 00 20 00 48 0b 4b 54 21 d6 39 f2 75 13 48 89 4b 54 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b eb d0 <0f> 0b 48 89 4b 54 5b 41 5c 41 5d 41 5e 41 5f 5d c3 66 66 66 66 90
[17648.566458] RSP: 0018:ffff99b50080fc68 EFLAGS: 00010206
[17648.566459] RAX: 0000000000000000 RBX: ffff99b50080fd88 RCX: 0521000585200015
[17648.566460] RDX: 0000000085010005 RSI: 0000000085000005 RDI: ffff99b50080fdc8
[17648.566461] RBP: ffff99b50080fc90 R08: 0000000000000000 R09: 000000000000000c
[17648.566462] R10: ffff99b50080fdd8 R11: ffff99b60080fdbb R12: ffff8a8349910870
[17648.566463] R13: ffff8a834a525800 R14: ffff8a8349943800 R15: ffffffffc099a6c0
[17648.566464] FS:  00007ff4345cbb80(0000) GS:ffff8a838a300000(0000) knlGS:0000000000000000
[17648.566465] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[17648.566466] CR2: 00007ff4347ca294 CR3: 00000000cb400000 CR4: 00000000000406e0
[17648.566467] Call Trace:
[17648.566472]  __video_do_ioctl+0x1a7/0x410 [videodev]
[17648.566474]  ? alloc_set_pte+0x118/0x610
[17648.566477]  ? filemap_map_pages+0x24c/0x380
[17648.566482]  ? v4l_s_fmt+0x670/0x670 [videodev]
[17648.566487]  video_usercopy+0x300/0x700 [videodev]
[17648.566493]  video_ioctl2+0x15/0x20 [videodev]
[17648.566498]  v4l2_ioctl+0x4c/0x60 [videodev]
[17648.566499]  do_vfs_ioctl+0x407/0x670
[17648.566502]  ? do_user_addr_fault+0x216/0x450
[17648.566503]  ksys_ioctl+0x67/0x90
[17648.566505]  __x64_sys_ioctl+0x1a/0x20
[17648.566507]  do_syscall_64+0x57/0x190
[17648.566508]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[17648.566509] RIP: 0033:0x7ff43494a89d
[17648.566510] 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 c3 f5 0c 00 f7 d8 64 89 01 48
[17648.566511] RSP: 002b:00007ffeccf5f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[17648.566513] RAX: ffffffffffffffda RBX: 00007ff4347ca280 RCX: 00007ff43494a89d
[17648.566514] RDX: 00007ffeccf5f1d0 RSI: 0000000080685600 RDI: 0000000000000003
[17648.566514] RBP: 00007ffeccf5f1a0 R08: 00007ffeccf5f330 R09: 00007ffeccf5f330
[17648.566515] R10: 00007ffeccf5f330 R11: 0000000000000246 R12: 0000000000000011
[17648.566516] R13: 0000000000000000 R14: 00007ffeccf5f1d0 R15: 000056550a31a5d0
[17648.566518] ---[ end trace f7f2411a3d979c10 ]---

看起来 v4l 驱动程序中的某些东西正在崩溃，但我没有足够的知识来自己解决问题。

请让我知道我是否应该发布更多信息，例如

• 更多来自 dmesg
• modinfo bttv
• systool -vm bttv
• v4l 信息 lspci
• scanpci.gatos

或其他任何东西。我会密切关注这个问题。