Alan Altmark <[email protected]> writes:

> Sven asked about this on an internal IBM discussion channel and I
> mentioned that there are two issues that I can see in the Linux 3270
> support:
>
> 1.  Linux is definitely doing it wrong on z/VM.  Linux infers the
> dimensions of the screen from a model number.  (Bzzzzzzt!)  If you
> have a standard-size screen for model 2, 3, 4, or 5, then the model
> number from DIAG 0x210 will be correct.  Otherwise it will reflect
> model 2.  I'm not sure why CP does that or why Linux is using the
> model number at all.  Even at the turn of the century it was
> irrelevant.

The model number is only fetched to present it via the TUB* ioctls to
userspace. The linux kernel itself only uses the row/column values.

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