– Improved Dynamic Power Management support for newer Radeon GPUs and other changes after the Radeon DPM feature was merged in Linux 3.11 

– A Snapdragon KMS/DRM driver from the Freedreno project for the Qualcomm Adreno. 

– Runtime GPU power management for NVIDIA Optimus laptops to be able to dynamically power on/off secondary GPUs. 

– Experimental support for DRM render nodes. 

– AMD Berlin APU support for the first HSA server APU. 

– Intel Haswell graphics improvements with eLLC DRAM support now enabled for the systems with Iris Pro 5200 graphics bearing dedicated memory for graphics. 

– Staging driver updates. 

– Sound driver work. 

– EXT4 gained new features of aggressive extent caching and better recovery. 

– F2FS file-system improvements. 

– Lenovo Ideapad Slidebar support. 

– XFS file-system improvements. 

– Btrfs file-system performance improvements.