Same issue for me along with multiple other problems logout not working,
Graphics display not propagating until I mouse over even then its not permanent
fix.
Maybe we can start with this: screen display problem
lspci -nnk | grep VGA -A1
00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor
Integrated Graphics Controller [8086:0046] (rev 18)
Subsystem: Dell Core Processor Integrated Graphics Controller
[1028:0457]
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Dock Devs, which is subscribed to Cairo-Dock Core.
https://bugs.launchpad.net/bugs/1596067
Title:
Data from such a repository can't be authenticated
Status in Cairo-Dock Core:
New
Bug description:
When I try to update (sudo apt-get update) Ubuntu 16.04 on any pc who
has cairo dock installed, i get the following error:
W: The repository 'http://ppa.launchpad.net/cairo-dock-team/ppa/ubuntu xenial
Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore
potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration
details.
E: Failed to fetch
http://ppa.launchpad.net/cairo-dock-team/ppa/ubuntu/dists/xenial/main/binary-amd64/Packages
404 Not Found
E: Einige Indexdateien konnten nicht heruntergeladen werden. Sie wurden
ignoriert oder alte an ihrer Stelle benutzt.
I added the ppa this way:
echo "deb http://ppa.launchpad.net/cairo-dock-team/ppa/ubuntu $(lsb_release
-sc) main # Cairo-Dock-PPA" | sudo tee -a /etc/apt/sources.list
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E80D6BF5
The error is really anoying because the update Error throw an error
that I should check my Internet Connection...
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