I've successfully converted my 4 year old installation of KDE4/SysV/Grub Legacy to KDE5 - Plasma/SystemD/Grub2.  I have some questions for anyone who has done something similarly: Information$ sudo lspci  00:00.0 RAM memory: NVIDIA Corporation MCP61 Host Bridge (rev a1)  00:01.0 ISA bridge: NVIDIA Corporation MCP61 LPC Bridge (rev a2)  00:01.1 SMBus: NVIDIA Corporation MCP61 SMBus (rev a2)  00:01.2 RAM memory: NVIDIA Corporation MCP61 Memory Controller (rev a2)  00:02.0 USB controller: NVIDIA Corporation MCP61 USB 1.1 Controller (rev a3)  00:02.1 USB controller: NVIDIA Corporation MCP61 USB 2.0 Controller (rev a3)  00:04.0 PCI bridge: NVIDIA Corporation MCP61 PCI bridge (rev a1)  00:05.0 Audio device: NVIDIA Corporation MCP61 High Definition Audio (rev a2)  00:06.0 IDE interface: NVIDIA Corporation MCP61 IDE (rev a2)  00:07.0 Bridge: NVIDIA Corporation MCP61 Ethernet (rev a2)  00:08.0 IDE interface: NVIDIA Corporation MCP61 SATA Controller (rev a2)  00:08.1 IDE interface: NVIDIA Corporation MCP61 SATA Controller (rev a2)  00:09.0 PCI bridge: NVIDIA Corporation MCP61 PCI Express bridge (rev a2)    00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor HyperTransport Configuration  00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Address Map  00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor DRAM Controller  00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Miscellaneous Control  00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Link Control  01:07.0 Network controller: Qualcomm Atheros AR922X Wireless Network Adapter (rev 01)  02:00.0 VGA compatible controller: NVIDIA Corporation GF116 [GeForce GTX 550 Ti] (rev a1)  02:00.1 Audio device: NVIDIA Corporation GF116 High Definition Audio Controller (rev a1)$ sudo uname -aLinux host-removed 4.1.15-gentoo-r1 #1 SMP Tue Apr 12 01:05:09 CDT 2016 x86_64 AMD Athlon(tm) II X2 255 Processor AuthenticAMD GNU/LinuxIf you need more information, let me know in the comments, and I'll add it to the block above.IssuesI know I have a lot of Cruft.  Can I remove the directory /etc/init.d now that the major switchover is complete?Does anyone know the XSESSION value for Plasma?  I'd like to remove SDDM (systemctl stop sddm && systemctl disable sddm), and use startx, so that I can research #3 without my laptop.Using the Gentoo nouveau Wiki Entry, I did successfully remove x11-drivers/nvidia-drivers and compiled in nouveau and DRI with KMS, but upon reboot, all I get is a black screen with a blinking cursor in the upper left corner.  Note that the terminal works, and modesetting was successful, until the SDDM service starts. In the interim, I've switched back to x11-drivers/nvidia-drivers.snd-hda-intel and snd-hda-intel-generic start but spit out something about error -16 or error -116.  I'd print the exact error here, but switching terminals causes a lockup, which is why I'm attempting #3.
SystemD Conversion - In Progress
systemd;nvidia;gentoo