After installing Fedora 26, it won't recognize my xonar dg pci card, which was working fine in Fedora 19. Or I should say Alsa recognizes it, but Pulse doesn't. Either way, I can't get a peep out of it.

Pulse does see on-motherboard sound, and hdpi sound on my radeon hd4650. The catch is, I can't get hdpi sound out through the agp interface, and mb audio is disabled in bios.

Soooo I found this online available at a local computer store:
https://techsourcecanada.ca/pc-components/sound-cards/usb-5.1-sound-card/

Went down on my lunch break and picked one up then tested it from a Fedora 26 live dvd and voila: sound! (also tested working in Windows 10).

It looks horribly cheap.

I've got some equally cheap ones that do a good enough job. Never paid for a sound card since onboard audio became standard.

And why is it disabled in the BIOS?

It was giving me problems. Also I got spoiled by having a SBLive (which died). Much better sound.

I've used a pair of these for about the last 10 years. I bought them for £6 in a corner shop when I had no space for larger speakers, not much money, and I'd given up bothering about sound quality. Little rubber-mounted aluminium cones, and for the price of a couple of drinks in a pub they're just amazingly good. Could I do better? Of course - but probably for 5-10 times the price.

OK, that's nice, but I FOUND my speakers in the LAUNDRY ROOM and they SOUND AWFUL.

Also works in xp I accidentally discovered. Sound in game is awful compared to the xonar.