Hi cools,
Thanks a lot for the new kernel (-ck). I managed to install it and created a new entry in syslinux.cfg in order to use it (this was surprisingly easy).
Then I tested GroovyMAME again, and unfortunately I'm getting the same results regarding lag. When recording at 120 Hz, this means I have a frame count of 6 to 8, from the moment the led lights up until the action happens (Terra Cresta), being 6 frames very rare and 8 the most usual value. This translates into 3-4 real frames, as compared to 1.5-2 of XP.
Maybe I should have run some command to assign a higher priority to the GM process?
(Due to my incompetence I managed to destroy my Groovy pendrive installation by taking it out from the usb too early so I'll have reinstall it tonight. These usb installations are incredibly delicate).
I'm going to have a go with linux-ck when I get the chance. I've a feeling it might be X causing it rather than the kernel though, the lag wasn't the problem when using AdvanceMAME...
Yes, it might be X causing the lag... but the same lag was present in the tests done by Vicosku, using Retroarch in KMS mode (no X).
It looks like the Windows raw input method beats anything we've seen by now.