mame-libretro not finding *any* roms on network drive

[SiliconPi]

This problem has been driving me nuts. I can run ROMs from a local copy ./RetroPie/roms/mame_libretro, no problem at all.
But as soon as I map a network drive even with the exact same file structure and files, identical owner, permissions, everything identical - it all turns to custard. No ROMS can be found. Is there anyway of getting a more verbose error messages out of mame-libretro?
All other emulators work fine on a network share.

My fstab entry is:

#//192.168.0.5/Archive/Roms/mame-libretro /home/pi/RetroPie/roms/mame-libretro cifs username=xx,password=xx,user=pi,rw,uid=1000,gid=1000,file_mode=0777,dir_mode=0777,vers=2.0 0 0

Any help would be appreciated, I have no clue what it is going on.

Cheers

[mitu]

@siliconpi Use the https://retropie.org.uk/docs/Runcommand/ menu to enable verbose logging and then look in /dev/shm/runcommand.log to spot any errors/information.

[SiliconPi]

@mitu

Thanks for your reply,

Unfortunately it does not reveal much, the first hint of trouble is this line:

[ERROR] Failed to load content.

Comparing to the same ROM loading to the same directory structure but unmounted, shows that this is when reading from the zipped rom is happening.

[libretro INFO] osd_fopen (buffer = [/home/pi/RetroPie/roms/mame-libretro/mame2003/roms/19xxh.zip]), (directory: [/home/pi/RetroPie/roms/mame-libretro/mame2003/roms]), (path type dir: [rom]), (path type: [1]), (filename: [19xxh.zip])

Could it be timeouts, or something? Slow network?

The only other thing of interest is right near the top of the log on the local attempt are these two lines:

[INFO] Redirecting save file to "/home/pi/RetroPie/roms/mame-libretro/mame2003/roms/19xxh.srm".
[INFO] Redirecting savestate to "/home/pi/RetroPie/roms/mame-libretro/mame2003/roms/19xxh.state".

Those are completly missing when running from a network share.
what could cause those redirects to not occur? Cant write to the location? But I can create and edit files at that location no problem....

I've piped the two directory structures to a file and compared and they really are identical. This really is causing me to lose hair! :)

[mitu]

@siliconpi Can you post the complete verbose log on a site like pastebin.com to look at it ?
Can you run zipinfo /home/pi/RetroPie/roms/mame-libretro/mame2003/roms/19xxh.zip from a terminal/ssh session to see if the zip ROM is accesible on the mountpoint ?
Can you try adding forceuid=1000,forcegid=1000,rw to the mount options, just to make sure the permissions are set ok ?