Not quite so, as they had a robust server market for HP-UX on the high end with its lucrative services market. Yes, that has been dying to Linux recently, but it was a cash cow for a long time after the Compaq purchase. Compaq itself died from making the massive misstep of buying DEC, which had started making the transition to services (and incidentally part of the eventual appeal of HP buying them). HP has continued to move into services, acquiring EDS, which had dumped almost all of its non-services based, primarily, IMO, to keep its stock from going junk (despite saying it was to streamline... why else dump profitable divisions?). In fact, HP was attempting to get out of the PC market entirely fairly recently.
As an oddity, I've worked for every one of these companies at some point, and only one during transition (UGS back to EDS).
As an additional oddity, I currently work for an autonomy customer that had questioned autonomy's stability and direction before the merger and started supporting Solr in parallel. I don't know why they believed autonomy was in danger, but apparently our marketing folk are smarter than they look. In any case, the only way we dump autonomy is if they stop supporting it because we have customers giving us boatloads of money to support it.