I have been doing that. I even purchased a new Toshiba 4k laptop after confirming with their tech support that it can output 8 channel audio; only to discover, after receiving it, that they were wrong. I have read the specs on numerous units and the specs on audio processing are just not there. After the Toshiba fiasco I'm not sure I trust any of the info I have received from the manufacturers. The Toshiba return was painless, the others may include a restocking fee.
My reason for posting here was that others that may want to individually chart all the speakers in their setup could offer first had confirmation of a laptops' capabilities.