Re: [Trisquel-users] Can't upgrade to Trisquel 7.0 :-(

[t8mf4nu6lizp]

One thing you could further try with radeon unblacklisted is adding the  
nomodeset grub parameter.

You need to edit (as superuser) /etc/default/grub and add nomodeset to the  
parameters after GRUB_CMDLINE_LINUX_DEFAULT

Then exit and save and run (as superuser) update-grub

And reboot.