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DK Bose
Asked: 2020-04-26 05:47:27 +0800 CST

Why does "Automatically connect eligible plugs and slots of snap "okular"" take a relatively long time?

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Xubuntu 20.04 (in a VM)

I've installed ksnip as a snap but I noticed that

Automatically connect eligible plugs and slots of snap "ksnip"

took a long time (5-10 min) after ksnip was downloaded.

Installing okular as a snap took even longer (after okular itself was downloaded). 

$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            1.9G     0  1.9G   0% /dev
tmpfs           394M  1.2M  393M   1% /run
/dev/sda5        20G  6.2G   12G  35% /
tmpfs           2.0G     0  2.0G   0% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/sda1       511M  4.0K  511M   1% /boot/efi
tmpfs           394M   16K  394M   1% /run/user/1000
/dev/loop0       28M   28M     0 100% /snap/snapd/7264
/dev/loop1       55M   55M     0 100% /snap/core18/1705
/dev/loop2      1.0M  1.0M     0 100% /snap/ksnip/3
/dev/loop3       63M   63M     0 100% /snap/gtk-common-themes/1506
/dev/loop4      261M  261M     0 100% /snap/kde-frameworks-5-core18/32
/dev/loop5       20M   20M     0 100% /snap/okular/98
/dev/loop6      291M  291M     0 100% /snap/kde-frameworks-5-qt-5-14-core18/4
$

So what is happening during this process? Is it normally time-consuming?

Is it that the other "supporting" snaps were being downloaded with the less-than-meaningful (to me) "Automatically connect eligible plugs …" nessage? ksnip is a qt-based program and pulled in /snap/kde-frameworks-5-core18/32. And okular, also a qt-based program, pulled in /snap/kde-frameworks-5-qt-5-14-core18/4 both of which are much, much larger than ksnip and okular. In which case, the delay would just be a network issue?

snap

1 Answers

  1. It seems that

    Automatically connect eligible plugs and slots of snap "..."

    is just a way to indicate that supplementary material is being downloaded.

    While the downloading of okular has a straightforward progress indicator, the time while "Automatically connect eligible plugs and slots of snap "..."" is in progress is denoted by just a rotating |.

    However, if one keeps Ubuntu's system monitor open at the same time, it's quite evident that "Automatically connect eligible plugs and slots ..." means a download is in progress.

    The process in the terminal and the downloading activity shown in the system conclude at the same time.

    In the case of installing the okular snap on a clean (no other qt-dependent snap having been installed) Ubuntu 20.04, the supplementary material downloaded after the okular snap is kde-frameworks-5-qt-5-14-core18 5.68.0. Watching the network activity in the system monitor indicates that approximately 333 MiB were downloaded.

    It's not a big deal but now I know that "Automatically connect eligible plugs and slots ..." means downloading stuff.

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