[BRLTTY] Next and previous console commands lose position

[Dave Mielke]

[quoted lines by Lee Maschmeyer on 2011/10/15 at 12:16 -0400]

>This suggests it's specific to the bc640

No, that's not possible. Key table processing provides a solid wall between 
what the driver sends and what the core receives. The driver sends key events - 
the core receives commands. If the device wer sending something odd, that'd 
very likely cause the key bindings to be misinterpreted. If anything in all of 
htis procesisng were wrong, it'd be extremely unlikely that you'd be seeing 
something so apparently well-defined.

>or the feature pack 

I doubt that the FP cluld be introducing this kind of problem. I've now seen 
lots of logs from BC640's with an FP, and none of them give any indication that 
the FP is interfering with key event packets from the base unit.

>or perhaps to the 2.6 firmware. 

I also doubt this. You can send me a log if you like, in which case I'll check 
it very carefully in order to confirm. If you do, yes, I need to see the input 
packets.

>I know my firmware was installed improperly because the device crashes
>if I put anything in the "notes" folder. Maybe it's sending something
>despicable...

A log would reveal such a thing. Again, though, you seem to be seeing something 
so well-defined that, whatever is the cause, it really has to be the same no 
matter which device is being used.

Another fact which needs to be considered (at least by myself) is that the core 
contains no code which is actively aware of virtual console switching, other 
than in the areas of cursor routing, cursor dragging (really, a special case of 
cursor routing), and speech tracking. The general code simply asks the system 
which virtual console is active, points to a structure which contains its 
state, and then does it's thing. The only thing I can think of which might 
cause what you're seeing is if your system is operating at just the right speed 
so that the switch, which is asynchronous, is taking place right between when 
the core asks which console is active and when it retrieves the cursor location 
of the current console. I'm not even sure if that's possible, but I'm still 
raising it as a possibility.

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Dave Mielke           | 2213 Fox Crescent | The Bible is the very Word of God.
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