I can confirm that installing grub-efi-amd64 as Justin mentioned, did
the trick for me as well.
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https://bugs.launchpad.net/bugs/1874315
Title:
installed grub-efi-amd64-signed package
Same problem here after upgrading from 19.10
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https://bugs.launchpad.net/bugs/1874315
Title:
installed grub-efi-amd64-signed package post-installation script
subprocess returned
Reproducible via the CLI too
```
fwupdmgr update
Downloading 21.00 for XPS13 9360 Thunderbolt Controller...
Fetching firmware
https://fwupd.org/downloads/eac3961ba9bd466f6e34d9276c27d524395d7c3c-NN1TN_NVM21.00.cab
Downloading… []
Updating 21.00
I can confirm the issue in my Dell XPS 13 9350
Kernel version: 4.4.0-22-generic
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https://bugs.launchpad.net/bugs/1566302
Title:
Ubuntu 16.04: Suspend freezes the system after upgrade
Same problem here, Ubuntu 16.04 on dell xps 13 9350 4.4.0-21-generic
After a suspend I can not shutdown nor reboot, getting the error
mentioned.
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https://bugs.launchpad.net/bugs/1441253