Ok tried to reproduce @dariSSight issue
magic lantern on I get NO SIGNAL on External Monitor
Tested with the latest 10-12built
Magic Lantern raw_video_10bit_12bit.2018Oct10.5D2212
Camera : 5D2
Firmware : 212
Changeset: db4ee396f4a2 (raw_video_10bit_12bit_LVState) tip
Built on : 2018-10-10 14:11:49 by jenkins@nightly
Everything work as expected , thou mlv_lite did give me a little trouble .
A couple of times the external monitor (hdmi 1080i) did fail to get a signal
on reboot with hdmi connected , but I just re-freshed the connection by un-plugin
then plugin the cable back in , but no more then 2 times then all good.
mlv_rec didn't show any issue , and by rebooting with the hdmi connected
the image is more stable (very little to no pink/flashing sheering frames) even with mlv_lite .
But still not recordable to hdmi hard drive recorder ( frame sheering on lower half of image , very noticeable on quick pans)
But if you "Force hdmi to VGA" (480p) you can get a clear image without pink/flashing frames .
I had no problem bypassing magic lantern (press set button when the power switch is turn on)
with hdmi monitor connected , and I always had a signal to the hdmi .
So without more details (cams setting , mlv_rec ?, monitor connection , etc. ... ) there really no way to diagnose this .
I did see mlv_rec more stable @ 1080i then mlv_lite , thou at reboot with hdmi connected
both seem to have better/stable image with mlv_rec being almost perfect .
There so much overhead now that 1080i is just too much to handle .
I did notice in mlv_lite if you set preview to FrozenLV with hdmi connected the image seem to get very stable
not perfect (still has a delay lower frame sheer , but not as bad as with "auto preview" for Liveview