Potential MagicLantern Bug on 5DII Nightly (2018-04-15)

Running into some BIZARRE issues with MagicLantern on EOS 5DII.

Maybe someone will find this useful and know I am not crazy lol.

Toshiba 1066x UDMA7 64GB CF card.

ML tested on Canon 50D and Canon 5DII.

  • 50D + latest ML nightly (magiclantern-Nightly.2018Feb04.50D109.zip) work flawlessly.
    • Wakeup/startup speed normal (< 1s)
    • Hence: This Camera + Card + ML version works at least.
  • 5DII + same card (formatted) + without any ML: wake/boot normally, lightning fast. wake < 0.5s, startup < 0.5s.
  • 5DII + same card + 5DII ML Nightly = slow wake (about 1.5s), slow startup (2s). Seems spent on reading the card with red access light on
    • Tested with ML “magiclantern-Nightly.2018Feb04.5D2212”. Still slow.
    • Tried reformat card in camera. No use.
    • Tried low level reformat card in PC into exFat with different larger block size, not recognized in camera, reformat in camera, no use.
    • Tested with older nightly as far as almost one year back: “magiclantern-Nightly.2017May07.5D2212”. Exact same issue. No use.
  • 5DII + NO card + ML = fast wake (about 0.5s), fast startup (0.5s).
  • 5DII + NO card + NO ML = fast wake (about 0.5s), fast startup (0.5s).

Quite odd that 5DII, which started the ML testing/play/exploration, is the one with this bug. I initially thought this would be a camera issue as I got it used 5DII but no ML test ruled that out. I thought it could be the card, but same card on 50D ML works wondrously so it must be something related to 5DII + this card + ML.

So far, the real fix for this kind of slow wakeup and slow startup lag is to remove ML/bootflag by installing ML and leave it on for 60s so it removes the bootflag.

It might be a quite old bug/quirk. Other similar reports of this issue with the ONLY resolution being removal of ML/bootflag. Here is a brief review of all prior 5DII and 5DIII bug I found via search

  • 2012:
    • https://www.dpreview.com/forums/thread/3016685
    • https://www.magiclantern.fm/forum/index.php?topic=2049.0
    • https://www.magiclantern.fm/forum/index.php?topic=2745.0
    • https://www.magiclantern.fm/forum/index.php?topic=2883.0
  • 2013/2014:
    • http://photography-on-the.net/forum/showthread.php?t=1321731
    • Might be even related to the issued reported in 5DIII as reported here: https://www.magiclantern.fm/forum/index.php?topic=10992.0
    • It seems this delay is “accepted” by a hero forum member, Walter Schulz as shown here: https://www.magiclantern.fm/forum/index.php?topic=13698.0 suggesting this cam bootflag related delay is a known issue, as far back as 2014 with 5DIII? Could this be an old bug rearing its head?
    • https://www.magiclantern.fm/forum/index.php?topic=7488.msg64184#msg64184
    • Further evidence suggest it was a known issue:  https://www.magiclantern.fm/forum/index.php?topic=10992.25
    • Further evidence about the 2s delay: https://www.cinema5d.com/guide-raw-on-a-5d-mark-iii-magic-lantern/
      • “NOTE: When installing Magic Lantern your camera will start up 2 seconds slower (this can now be undone by simply uninstalling Magic Lantern)”
      • I wonder if it is ever fixed for 5DIII
  • Current:
    • FAQ: https://wiki.magiclantern.fm/faq “startup time may be a little slower, even on non-ML cards.”
      • Oddly, it actually happens ONLY on ML cards.

So I guess I will be running my 5DII without ML for a while.

2018-04-22 Update: tried with a different CompactFlash card SanDisk Extreme III. Still same issues. Definitely not card related. Might be specific version of hardware with  issue?