So instead of downgrading my BIOS, I've updated it from 1.2.29 to version 1.3.0 which was released two days ago by DELL for the XPS15 9550. USB ports at the TB16 is now working without issues again.
I don't get any checksum errors, too:
for i in 1 2 3 4; do curl -s http://de.releases.ubuntu.com/zesty/ubuntu-17.04-server-amd64.img -o $i.iso; md5sum $i.iso; done
4672ce371fb3c1170a9e71bc4b2810b9 1.iso
4672ce371fb3c1170a9e71bc4b2810b9 2.iso
4672ce371fb3c1170a9e71bc4b2810b9 3.iso
4672ce371fb3c1170a9e71bc4b2810b9 4.iso
So instead of downgrading my BIOS, I've updated it from 1.2.29 to version 1.3.0 which was released two days ago by DELL for the XPS15 9550. USB ports at the TB16 is now working without issues again.
I don't get any checksum errors, too: de.releases. ubuntu. com/zesty/ ubuntu- 17.04-server- amd64.img -o $i.iso; md5sum $i.iso; done 70a9e71bc4b2810 b9 1.iso 70a9e71bc4b2810 b9 2.iso 70a9e71bc4b2810 b9 3.iso 70a9e71bc4b2810 b9 4.iso
for i in 1 2 3 4; do curl -s http://
4672ce371fb3c11
4672ce371fb3c11
4672ce371fb3c11
4672ce371fb3c11