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I have been using Slack (Desktop App) for months now, without any problem. Today, for no apparent reason, the laptop (HP Envy) froze and since then Slack is not working anymore. It seems to try to launch, but then nothing. Any ideas?

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    Also seeing this - having to resort to the browser version for now. – Ross Jul 8 at 12:04
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    Looks like 4.7.0 was released yesterday and slack don't allow you to install an older revision. So until the next release is out, the web version seems to be the only choice. – Ross Jul 8 at 12:22
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    snaps are updates are revertable. So if you have had a working slack that just suddenly died on you, then See leonexis' answer below for how to easily revert the update of slack. – KlausCPH Jul 11 at 22:04
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Looks like there is a confirmed issue with the snap package.

We’re very sorry for the trouble there. We are experiencing some difficulties with the Slack Snap package. Our team is working hard to resolve the issue as quickly as possible. For now, you can access Slack via a browser or on our Direct Download version: https://slack.com/intl/en-gb/downloads/linux?eu_nc=1

Source: https://twitter.com/SlackHQ/status/1280808281989152771

A fix should be available in the next snap slack package release.

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    If you haven't already tried reinstalling the Slack snap, leonexis' answer could save you a lot of trouble. – Lambart Jul 10 at 13:46
  • I've have had the same experience and reinstalling slack with their deb package hoping this would work but recently I also had problems starting eclipse on ubuntu 20.04 I attempt to reinstall it cause I thought restoration to ssd have something to do with it but it still did not work and a couple of days later it started working again, I'm new to snap cause I've using apt since so I wonder if snap have something to do with this issue? there are also other packages installed here with snap and won't open as well – Christopher Pelayo Jul 15 at 22:43
  • It could be coincidental, either way until they do a new release on 20.04, install 4.7.0 via the deb package for it to work. – Ross Jul 17 at 7:49
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Slack 4.7.0 seems to be the issue. Contrary to one of the comments above, it is entirely possible to install an older version, which is one of the key features of Snaps...

To revert back to the previous version of Slack, use sudo snap revert slack:

$ snap list --all slack
Name   Version  Rev  Tracking       Publisher  Notes
slack  4.4.3    24   latest/stable  slack✓     disabled,classic
slack  4.7.0    25   latest/stable  slack✓     classic

$ sudo snap refresh slack
snap "slack" has no updates available

$ sudo snap revert slack
slack reverted to 4.4.3

Try to update again when there is a version above 4.7.0. This resolved my issue on Ubuntu 18.04 which exhibited the same issue (try to launch then immediately closes).

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    Thanks, but what if 4.4.3 is not in the list? Mine lists 3.3.1, which when run, demands an upgrade to 4.7.0. – user1103866 Jul 9 at 13:57
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    I tried re-installing it before learning of this command, so I don't have this option either. There doesn't seem to be a way to install older versions of slack via snap (snap supports that, but slack only publishes the latest version...) – Eloff Jul 10 at 13:08
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    I can confirm with worked for me on 18.04. Would it be best to post a new question asking 18.04 and offering this as an answer? – Andres Jul 11 at 2:18
  • Unfortunately, I had already tried reinstalling Slack. I will keep this in mind next time! – Camila Jul 14 at 14:27
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    I'm using Ubuntu 20.04. Unfortunately, version 4.4.3 is not listed when running this command. David Barratt's suggestion to download the .deb worked though. – Zion Perez Jul 15 at 2:24
12

I fixed this problem by removing the snap and installing the deb instead. https://slack.com/downloads/linux

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  • This worked for me on Ubuntu 20.04. Thank you! – Zion Perez Jul 15 at 2:21
0

Following the answer from leonexis, I used the following to get the older version of slack -- I too had reinstalled and thus could not use the nifty slack revert command...

wget https://downloads.slack-edge.com/linux_releases/slack-desktop-4.3.2-amd64.deb
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0

Installing the latest version (4.7.0) directly through .deb worked for me on Ubuntu 20.04:

wget https://downloads.slack-edge.com/linux_releases/slack-desktop-4.7.0-amd64.deb
sudo dpkg -i slack-desktop-4.7.0-amd64.deb
rm slack-desktop-4.7.0-amd64.deb

I would prefer to install through Snap so I'm going to keep an update on the Snapcraft release to see when it hits the next version. Until then, this is a good work-around.

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