Linksys Official Support - Linksys WRT1900AC AC1900 Dual
Dec 08, 2017 Linksys finally supports DD-WRT firmware on WRT-series AC Jan 04, 2016 DD-WRT vs. Tomato vs. OpenWrt: Which Router Firmware Is Feb 04, 2019
Hard reset or 30/30/30 - DD-WRT Wiki
It looks identical to the WRT1900AC, but has a 1.6 GHz dual core CPU (Same CPU as WRT1200AC/WRT1900AC v2, but overclocked to 1.6 GHz). Like the WRT1900AC v2, it has 512 MB of RAM. In January 2016, DD-WRT became available for the WRT1900ACS, as well as both versions of the WRT1900AC.
A good working relationship has been formed with Linksys to where there is now DD-WRT support planned for the Linksys WRT1900AC and WRT1200AC routers. This is possible due to Linksys and Marvel working closely to improve the upstream support for the Marvel CPUs and Wi-Fi radios. Stay tuned for more news in the near future! [Original Post]
Install and Configure a DD-WRT Kong Router : 16 Steps DD-WRT is a wonderful open source custom router firmware that is supported on many devices. It adds features, stability and configurability to consumer routers. However, it's not easy for a novice starting out with DD-WRT. There hasn't been an official stable release since 2008.