为什么文件管理器双击图片时，还要我选择用哪个软件打开？不是有默认设置了么

系统公告
1

为什么在文件管理器中双击图片时，还要我选择用哪个软件打开？不是有默认设置了么

2

可以截个图吗？

3

1.输入lsb_release -a，看下系统版本，贴里没说不知道哪个系统。

2.cat /usr/share/applications/mimeinfo.cache | grep image贴一下回显，
这个应该是当前用户默认打开各种类型图片的默认应用列表

4

参见附件，我下载nemo文件管理器后，我直接双击就能使用。

5

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal

cat /usr/share/applications/mimeinfo.cache | grep image
application/x-cd-image=burner.desktop;engrampa.desktop;gnome-disk-image-mounter.desktop;gnome-disk-image-writer.desktop;mate-disk-image-mounter.desktop;org.gnome.FileRoller.desktop;vlc.desktop;
application/x-raw-disk-image=gnome-disk-image-mounter.desktop;gnome-disk-image-writer.desktop;mate-disk-image-mounter.desktop;
application/x-raw-disk-image-xz-compressed=gnome-disk-image-writer.desktop;
image/bmp=org.gnome.eog.desktop;
image/gif=firefox.desktop;org.gnome.eog.desktop;
image/jpeg=firefox.desktop;org.gnome.eog.desktop;
image/jpg=org.gnome.eog.desktop;
image/pjpeg=org.gnome.eog.desktop;
image/png=firefox.desktop;org.gnome.eog.desktop;
image/svg+xml=org.gnome.eog.desktop;
image/svg+xml-compressed=org.gnome.eog.desktop;
image/tiff=org.gnome.eog.desktop;
image/vnd.rn-realpix=nextplayer.desktop;vlc.desktop;vst-video.desktop;
image/vnd.wap.wbmp=org.gnome.eog.desktop;
image/x-bmp=org.gnome.eog.desktop;
image/x-gray=org.gnome.eog.desktop;
image/x-icb=org.gnome.eog.desktop;
image/x-icns=org.gnome.eog.desktop;
image/x-ico=org.gnome.eog.desktop;
image/x-pcx=org.gnome.eog.desktop;
image/x-png=org.gnome.eog.desktop;
image/x-portable-anymap=org.gnome.eog.desktop;
image/x-portable-bitmap=org.gnome.eog.desktop;
image/x-portable-graymap=org.gnome.eog.desktop;
image/x-portable-pixmap=org.gnome.eog.desktop;
image/x-xbitmap=org.gnome.eog.desktop;
image/x-xpixmap=org.gnome.eog.desktop;
x-content/image-picturecd=burner.desktop;

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