Is it possible to use Electrum to create a multisig wallet where the Trezor device is required to send transactions? When I create a new wallet with the hardware wallet > Trezor option, I don't see an option to save my seed, nor create a multisignature account of where the Trezor holds one of the private keys. When I create a multisig 2 of 2 wallet, I do get a 13 word seed and asks me for my cosigner wallet public key.

Should I create a Trezor wallet first via Electrum's hardware wallet option, and then use its public key when generating the multisig account with Electrum?

Am I thinking about about this all wrong, or does Electrum not support multisig Trezor yet, and it's only GreenAddress.it?

I'm using Electrum 2.0 on Linux. My Trezor has the 1.3.1 firmware, which should support multisig (from 1.3.0 onwards).