[Bug 33292] Vietcong: Disc can't be authenticated

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=33292

Anastasius Focht <focht at gmx.net> changed:

           What    |Removed                     |Added
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                 CC|                            |focht at gmx.net

--- Comment #1 from Anastasius Focht <focht at gmx.net> ---
Hello folks,

is this problem still present? Please retest with recent Wine 1.7.x version,
preferably Wine 1.7.33

>From what you've described it could be the data density measurement phase
failing here.
I've described it here: https://bugs.winehq.org/show_bug.cgi?id=10190#c21

--- quote ---
The original media is recognized in general but there are some cases where it
still fails.
The reason is there a high precision time measurement done during software and
optical drive interaction, called "data density measurement".

There is a set of locations spread over the disc which are read using pairs of
SCSI read commands (pass-through) per location from the drive.
You can watch them using +cdrom channel.
While the disc spins the time is measured it takes for the second command to
return (depends on the time it takes the disc to do a full round = depends on
the data density).
Combining all predefined locations a vendor specific pattern is formed and
verified.

Wine might not be able to reliably guarantee certain timing constrains.

If your disk fails to be recognized this helps:

- start wineserver and services prior (notepad/whatever in different terminal)
- wait a bit until the drive/media completely stopped spinning before start

Don't run any CPU intensive processes in background that cause workload spikes
during time measurement/calibration phase.

(still fails: try again)
--- quote ---

If it still fails many times with the "time limit" message there is not much
that can be done here, unless you use less crappy original media (DVD) and
better host hardware (certain disk drives/models are pretty crappy when it
comes to validating copy protected media). Likely a WONTFIX.

Regards

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