modprobe：致命：在目錄中找不到模組 v4l2loopback

我使用核心 5.9.0.0 執行 debian 10 我從官方 repo 安裝了 v4l2loopback，如sudo apt install v4l2*安裝

sudo apt install v4l2*
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting 'v4l2loopback-source' for glob 'v4l2*'
Note, selecting 'v4l2ucp' for glob 'v4l2*'
Note, selecting 'v4l2loopback-dkms' for glob 'v4l2*'
Note, selecting 'v4l2loopback-modules' for glob 'v4l2*'
Note, selecting 'v4l2loopback-utils' for glob 'v4l2*'

我已經linux-headers-5.9.0-0.bpo.2-amd64 安裝了，並且

uname  -a
Linux debian 5.9.0-0.bpo.2-amd64 #1 SMP Debian 5.9.6-1~bpo10+1 (2020-11-19) x86_64 GNU/Linux

但是，當我嘗試為 v4l2 進行 modprobe 時，會發生以下情況：

sudo modprobe v4l2loopback
modprobe: FATAL: Module v4l2loopback not found in directory /lib/modules/5.9.0-0.bpo.2-amd64

文件夾存在，但我看不到這個模組。我嘗試清除 v4l2，重新安裝，重新啟動，什麼都沒有。

有什麼幫助嗎？

謝謝！

編輯：嘗試安裝它們時我實際上有一些錯誤，這是完整的輸出

sudo apt install v4l2loopback-dkms v4l2loopback-utils
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
 v4l2loopback-dkms v4l2loopback-utils
0 upgraded, 2 newly installed, 0 to remove and 1 not upgraded.
Need to get 0 B/54.6 kB of archives.
After this operation, 153 kB of additional disk space will be used.
Selecting previously unselected package v4l2loopback-dkms.
(Reading database ... 378603 files and directories currently installed.)
Preparing to unpack .../v4l2loopback-dkms_0.12.1-1_all.deb ...
Unpacking v4l2loopback-dkms (0.12.1-1) ...
Selecting previously unselected package v4l2loopback-utils.
Preparing to unpack .../v4l2loopback-utils_0.12.1-1_all.deb ...
Unpacking v4l2loopback-utils (0.12.1-1) ...
Setting up v4l2loopback-dkms (0.12.1-1) ...
Loading new v4l2loopback-0.12.1 DKMS files...
Building for 5.9.0-0.bpo.2-amd64
Building initial module for 5.9.0-0.bpo.2-amd64
Error! Bad return status for module build on kernel: 5.9.0-0.bpo.2-amd64 (x86_64)
Consult /var/lib/dkms/v4l2loopback/0.12.1/build/make.log for more information.
dpkg: error processing package v4l2loopback-dkms (--configure):
installed v4l2loopback-dkms package post-installation script subprocess returned error exit status 10
Setting up v4l2loopback-utils (0.12.1-1) ...
Processing triggers for man-db (2.8.5-2) ...
Errors were encountered while processing:
v4l2loopback-dkms
E: Sub-process /usr/bin/dpkg returned an error code (1)

關於問題可能是什麼，輸出並不是很有說服力，我嘗試了 asudo dpkg --configure v4l2loopback-dkms但得到了同樣的錯誤

我會回答我自己的問題。由於我的核心是 5.9.0.0，我是從 buster-backports 安裝的，而 v4l2 是從 buster repo 安裝的，所以它關閉了。

我也通過安裝它來解決它，buster-backports它工作正常

引用自：https://unix.stackexchange.com/questions/624555