LG Optimus Slider (lg-vm701)

Contributors

 * Foldmorepaper

What Works
The kernel compiles!

What Does Not Work
Flashing is possible, but does not work due to these problems:
 * booting off SD is necessary as system and userdata partitions are too small for the current image
 * attempting to boot using  uploads but fails to boot after printing the cmdline to the screen.

Rooting
The exploit used on the LG Esteem also works on the Optimus Slider. Please see this forum thread on AndroidCentral for instructions. 

The tool referenced has a dead download link, but is available through the Internet Archive's Wayback Machine. LG_Esteem_Root.zip on archive.org

The tool runs from a .bat script. Though the changes necessary to run it on linux are trivial, here is the modified script: run.sh

Additional Info
Partitions fstab mtd

Custom Recovery
Two custom recoveries are available for the vm701. Use in the context of postmarketOS: To flash a custom recovery to the recovery partition (before having access to fastboot), the tool  is required. (available from, among other sources, BobZhome ROM's) flash_image Installation & Usage
 * CWM
 * Enable fastboot by formatting the the boot partition
 * Restore commonly-available Android system backups
 * TWRP
 * ADB access without booting Android

Booting to Recovery

 * From power-off: hold buttons Power + Volume Down until booted into recovery
 * Using ADB:
 * Using fastboot:

CWM
A custom CWM recovery is available from BobZhome ROM's. Push to SD card:

Flash from Android
Using, flash recovery image to recovery partition (from ADB):

Flash/Boot from Fastboot
Boot recovery image Flash recovery image

TWRP
Download the official TWRP recovery from the device page.  Push to SD card:

Flash from Android
Using, flash recovery image to recovery partition (from ADB):

Flash/Boot from Fastboot
Boot recovery image Flash recovery image

Fastboot
Fastboot is only available upon erasing/formatting the boot partition. There are alternative means of nulling the boot partition, but CWM is the easiest.

It is recommended, as always, to make a full system backup before doing any modifications. This is especially necessary in this case, as unbricking from emergency mode (camera button + backup button, plug in usb cable to computer) is not possible, even though the lg mobile support tool recognizes the device and downloads a firmware image, an unknown error occurs.

To format the boot partition, Mounts and Storage -> format /boot -> Yes - Format

On boot, fastboot should automatically start. To restore normal boot functionality, restore boot partition from backup.