I installed Mojave10.14.5 on my HP Elite x2 1012 G1. The touch screen and touch pad work at the same time using the information you provided. In addition battery indication and sleep are working.
The volume control switch below the left power switch does not work.
PC specification
HP Elite x2 1012 G1
macOS: Mojave 10.14.5
CPU: Core M3-6Y30
HDD: SSD 500GB SATA
Memory: 4GB 1867MHz DDR3
LCD: 12 inches WUXGA + (1920 x 1280 multi touch)
GPU: intel HD Graphics 515 1536 MB
WiFi: DW1560 card exchange
BIOS: SYSBIOS 01.39 revA (HP Elite x2 1012 G1 SYSBIOS latest version)
Install macOS Mojave USB Boot Disk: 1012G1 EFI Boot.zip
1012G1 Mojave SSD: EFI2.zip
1012G1 L / E: Extensions.zip
1012G1 BIOS:BIOS.zip
important point
1.Replace Extensions, EFI, and EFI Boot with each folder.
2.Selecting "Maximize my battery health" in BIOS / Advanced / Battrery Health Manager will charge up to 80% and extend battery life.
3.After updating the BIOS to the latest version, be sure to load factory default data and save it once. Then reboot and correct the BIOS settings. Please control unknown problems by doing this.
Thank you very much.
2019/10/7
Ver 10.14.6 (18G103)
When returning from sleep, the screen does not appear.
Bluetooth does not recognize
View attachment 428968