Problem with menu icons about grub2-theme-vimix

[Se7endAY]

You can find out the reason of why logo of linux mint is not correct in /etc/default/grub.d/50_linuxmint.cfg.

Solution

Open /boot/grub/grub.cfg with editor, and you will find some lines started with 'menuentry'. modify the value of --class option.

Example:
(before) menuentry 'Linux Mint 18.2 Cinnamon 64-bit' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option

(after) menuentry 'Linux Mint 18.2 Cinnamon 64-bit' --class linux-mint --class gnu-linux --class gnu --class os $menuentry_id_option

[sardus-X]

I have verified that in the /boot/grub/grub.cfg file the value of the --class option is "ubuntu" for linux mint distribution (main) and "gnu-linux" for all other distributions.
Is there a way to edit the /boot/grub/grub.cfg file (as You suggest) editing the /etc/default/grub file?
This issue only applies to uefi mode installations?

[Se7endAY]

@sardus-X It's not because of uefi mode.

1. backup the file /etc/grub.d/30_os-prober.
2. open this file with editor and add some lines like 5df5764.
3. update grub by running sudo update-grub.

[sardus-X]

open this file with editor and add some lines like 5df5764.
Excuse me, i would like to make sure to understand well: do you mean to only "add" the three "green" lines
+ CLASS="--class $(echo "${LABEL}" | LC_ALL=C sed 's,[[:digit:]]*$,,' | cut -d' ' -f1 | tr 'A-Z' 'a-z' | LC_ALL=C sed 's,[^[:alnum:]_],_,g')"
+
+menuentry '$(echo "$OS $onstr" | grub_quote)' $CLASS --class gnu-linux --class gnu --class os \$menuentry_id_option 'osprober-gnulinux-simple-$boot_device_id' {
Or the third one is a line replacing the existing one?

[Se7endAY]

@sardus-X

Add CLASS="--class $(echo "${LABEL}" | LC_ALL=C sed 's,[[:digit:]]*$,,' | cut -d' ' -f1 | tr 'A-Z' 'a-z' | LC_ALL=C sed 's,[^[:alnum:]_],_,g')" to your file before the line gettext_printf "Found %s on %s\n" "${LONGNAME}" "${DEVICE}" >&2.

Replace
menuentry '$(echo "$OS $onstr" | grub_quote)' --class gnu-linux --class gnu --class os \$menuentry_id_option 'osprober-gnulinux-simple-$boot_device_id' {
with
menuentry '$(echo "$OS $onstr" | grub_quote)' $CLASS --class gnu-linux --class gnu --class os \$menuentry_id_option 'osprober-gnulinux-simple-$boot_device_id' {

[sardus-X]

I tested with linux mint 18.2 in vmware: edited the /etc/grub.d/30_os -prober file and updated the grub file but it looks like it has not changed the situation. The grub menu works but the icon is still Ubuntu and in the grub.cfg file the value of the --class option is "ubuntu" too

[Se7endAY]

@sardus-X
1.Open the file /etc/grub.d/10_linux.
Replace
CLASS="--class $(echo ${GRUB_DISTRIBUTOR} | tr 'A-Z' 'a-z' | cut -d' ' -f1|LC_ALL=C sed 's,[^[:alnum:]_],_,g') ${CLASS}"
with
CLASS="--class linux-mint ${CLASS}"

2.Update grub.

[sardus-X]

After editing the /etc/grub.d/10_linux file seems to have duplicated the grub menu, however in order to better explain it I attached the grub menu image and the file /boot/grub/grub.cfg

grub.zip

[Se7endAY]

@sardus-X move the backup file to another folder.

[sardus-X]

moved all backup files (/etc/grub.d/30_os-prober; /etc/grub.d/10_linux) to another folder but unfortunately no changes.
Edit: restored the original /etc/grub.d/30_os-prober file (it is correct or must be both edited?) and after grub update It looks like it works..:)
It could also works with multiple distributions on a multiboot system (as in my case?)

[Se7endAY]

@sardus-X
Yes, you also need to edit the /etc/grub.d/30_os-prober file.