black screen after the greeter with AMD Radeon HD 7520G

Originally created by @goupille on #17379 (Redmine)

A user reported having this issue since the upgrade to tails 4.0 (no issue with tails 3.9).
Adding the following parameter to the boot options[https://tails.boum.org/doc/first_steps/startup_options/#boot_loader_menu] soved the issue :

radeon.modeset=0

Edited May 15, 2020 by goupille

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