How am I supposed to search for things like ..

[bernd_b]

.... nvida-driver
or
kernel update?

Having problem installing

x11-drivers/nvidia-drivers#3.7.0-sabayon
or
app-emulation/virtualbox-modules-4.2.4#3.7.0

I would have liked to check the forum if the issue is known. But the forum search tells me that all these words are too common

equo install app-emulation/virtualbox-modules#3.7.0-sabayon
>> @@ Calculating dependencies...
>> ## [N] [sabayon-weekly] app-emulation/virtualbox-modules-4.2.4#3.7.0-sabayon|0
>> @@ Packages needing to be installed/updated/downgraded: 1
>> @@ Packages needing to be removed: 0
>> @@ Download size: 152.8kB
>> @@ Used disk space: 2.1MB
>> @@ You need at least: 2.4MB of free space
>> ::: >>> (1/1) 1 package
>> ## Checksum does not match. Download attempt #1
>> ## ( mirror #1 ) Downloading from: http://na.mirror.garr.it
>> ## ( mirror #1 ) Error downloading from: http://na.mirror.garr.it - wrong checksum.
>> ## ( mirror #2 ) Downloading from: http://cross-lfs.sabayonlinux.org
>> ## ( mirror #2 ) Error downloading from: http://cross-lfs.sabayonlinux.org - wrong checksum.
>> ## ( mirror #3 ) Downloading from: http://mirror.clarkson.edu
>> ## ( mirror #3 ) Error downloading from: http://mirror.clarkson.edu - wrong checksum.
>> ## ( mirror #4 ) Downloading from: rsync://mirror.umd.edu
>> ## ( mirror #4 ) Error downloading from: rsync://mirror.umd.edu - discarded download.
.
.
.

eekly] x11-drivers/nvidia-drivers-310.19#3.7.0-sabayon|0
>> @@ Packages needing to be installed/updated/downgraded: 1
>> @@ Packages needing to be removed: 0
>> @@ Download size: 3.7MB
>> @@ Used disk space: 12.1MB
>> @@ You need at least: 19.4MB of free space
>> ::: >>> (1/1) 1 package
>> ## Checksum does not match. Download attempt #1
>> ## ( mirror #1 ) Downloading from: http://na.mirror.garr.it
>> ## ( mirror #1 ) Error downloading from: http://na.mirror.garr.it - wrong checksum.
>> ## ( mirror #2 ) Downloading from: http://cross-lfs.sabayonlinux.org
>> ## ( mirror #2 ) Error downloading from: http://cross-lfs.sabayonlinux.org - wrong checksum.
>> ## ( mirror #3 ) Downloading from: http://mirror.clarkson.edu
>> ## ( mirror #3 ) Error downloading from: http://mirror.clarkson.edu - wrong checksum.
.
.
.

[Fitzcarraldo]

Use DuckDuckGo (it doesn't bubble you or track you, and is an excellent search engine) and enter the text you want to find, followed by site:forum.sabayon.org in the search box, like so:

"wrong checksum" site:forum.sabayon.org

You still need to use common sense and have some Google foo, though.