Déjà Dup crash during fresh backup

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Hello, I am on a 24.04 LTS machine, default desktop Environment, installed last Christmas in a Lenovo V15 G4 IRU notebook.

I am using Déjà Dup (aka Backups) for my backups.
Déjà Dup periodically performs an entire fresh backup to protect against backup corruption. So far, it did this procedure twice and every time something went wrong, as you can see from attached screenshot. An error message appears, warning that “backup is not responding. You may choose to wait a short while for it to continue or force the app to quit entirely”.

I tried to click the ‘wait’ button 4 or 5 times then the ‘Force quit’ button 4 or 5 times (that is every time the warning message reappears). Finally the app quits.

This issues appears only during the entire backup procedure, not during partial backups.

However, it seems that nothing happens to my backups, because Déjà Dup after that creates partial backups without issues or any error message.

Does anyone of you have any idea of how can I solve this problem?

Screenshot from 2025-05-10 16-55-23

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Hi, since you say it fails on entire fresh backup, i’d just let it go without clicking force quit, that message is not an error you may just wait for it to finish.

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There’s a threshold in GNOME which defaults to 5000 that you can increase.

Here’s how you find out the value:

gsettings get org.gnome.mutter check-alive-timeout

You can set it to a higher value (i.e. it waits longer before showing the “not responding” message) with this:

gsettings set org.gnome.mutter check-alive-timeout 10000

On my laptop I set it to 60000 when my initial backups were causing this.

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Thank you for this information. Though I don’t have this issue with Deja Dup, I do have it with Steam and it’s been annoying the snot out of me for years now.

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