USB problems in 2.2.14pre9

USB problems in 2.2.14pre9

[brad allison]

I'm seeing the strange problem when I type cd really fast that it comes
out as cdcd or cdc .

Other people who's used my keyboard see the same thing, but you have to
type it really fast.  It seems almost random.

I didn't see the problem until I switch to 2.2.14pre9 and
Xpmac.rage128.usb.rev6 .  I backed out of Xpmac.rage128.usb.rev6 to
XF68_FBDev because of cut-and-paste problems with Xpmac.rage128.usb.rev6
and I'm still seeing this weird "cdcd" problem.

Anyone else seeing this?

-b

--
AOL SAPI    jackal@aol.net    jackal@kmfms.com    703.265.0908   AIM:jackal242
http://jackal.fudge.org        `I was never more certain of how far away I was
from my goal than when I was standing right beside it.' - Ethan Hawke, Gattaca


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Re: USB problems in 2.2.14pre9

[Stephen Edie]

Oh yes, I am using a USB keyboard right now.  It seems to happen whenever
more than three keys are simultaneously down...  When the fourth key is
pressed, it isn't reported.  At this point, releasing any of the four keys
causes duplicated key strokes to be reported.  Strange.

Stephen

Terra Soft Solutions, Inc.
 Yellow Dog Linux
 "The Ultimate Companion for a Dedicated Server"
 http://www.yellowdoglinux.com/

 Black Lab Linux
 Workstations and advanced, Parallel Solutions
 http://www.blacklablinux.com/

On Fri, 21 Jan 2000, brad allison wrote:

>
>
> I'm seeing the strange problem when I type cd really fast that it comes
> out as cdcd or cdc .
>
> Other people who's used my keyboard see the same thing, but you have to
> type it really fast.  It seems almost random.
>
> I didn't see the problem until I switch to 2.2.14pre9 and
> Xpmac.rage128.usb.rev6 .  I backed out of Xpmac.rage128.usb.rev6 to
> XF68_FBDev because of cut-and-paste problems with Xpmac.rage128.usb.rev6
> and I'm still seeing this weird "cdcd" problem.
>
> Anyone else seeing this?
>
> -b
>
> --
> AOL SAPI    jackal@aol.net    jackal@kmfms.com    703.265.0908   AIM:jackal242
> http://jackal.fudge.org        `I was never more certain of how far away I was
> from my goal than when I was standing right beside it.' - Ethan Hawke, Gattaca
>
>
>


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Re: USB problems in 2.2.14pre9

[Tom Rini]

On Fri, 21 Jan 2000, Stephen Edie wrote:

>
> Oh yes, I am using a USB keyboard right now.  It seems to happen whenever
> more than three keys are simultaneously down...  When the fourth key is
> pressed, it isn't reported.  At this point, releasing any of the four keys
> causes duplicated key strokes to be reported.  Strange.

Using a more current stack (2.3.40) I can use up to 6 keys (ie press 'em
one after another and the last pressed one works) and the 7th is ignored.

---
Tom Rini (TR1265)
http://gate.crashing.org/~trini/


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Re: USB problems in 2.2.14pre9

[Stephen Edie]

> Using a more current stack (2.3.40) I can use up to 6 keys (ie press 'em
> one after another and the last pressed one works) and the 7th is ignored.

Hmm, I also noticed that some combinations of keys will glitch on the
3rd keystroke.  Thinking about back when I learned about low-level
keyboard stuff, I think that some keyboards can only handle a certain
number of keys down or they report a "too many keys" code.  Perhaps this
code is not being handled correctly?  Or, maybe I'm just on crack.  (Hard
to say considering the way my day is going today)

Stephen

Terra Soft Solutions, Inc.
 Yellow Dog Linux
 "The Ultimate Companion for a Dedicated Server"
 http://www.yellowdoglinux.com/

 Black Lab Linux
 Workstations and advanced, Parallel Solutions
 http://www.blacklablinux.com/

On Fri, 21 Jan 2000, Tom Rini wrote:

>
> ---
> Tom Rini (TR1265)
> http://gate.crashing.org/~trini/
>
>


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Re: USB problems in 2.2.14pre9

[brad allison]

But I'm only pressing a maximum of _two_ keys "cd" and it's coming out as
"cdcd".

It's a real pain cause I do "cd" a lot.

I'm sure they are getting pressed somewhat at the same time cause I do it
so fast but still it shouldn't be glitching on that.

Also, I didn't see this problem in the 2.2.6.

-b


On Fri, 21 Jan 2000, Stephen Edie wrote:

>
> > Using a more current stack (2.3.40) I can use up to 6 keys (ie press 'em
> > one after another and the last pressed one works) and the 7th is ignored.
>
> Hmm, I also noticed that some combinations of keys will glitch on the
> 3rd keystroke.  Thinking about back when I learned about low-level
> keyboard stuff, I think that some keyboards can only handle a certain
> number of keys down or they report a "too many keys" code.  Perhaps this
> code is not being handled correctly?  Or, maybe I'm just on crack.  (Hard
> to say considering the way my day is going today)
>
> Stephen
>
> Terra Soft Solutions, Inc.
>  Yellow Dog Linux
>  "The Ultimate Companion for a Dedicated Server"
>  http://www.yellowdoglinux.com/
>
>  Black Lab Linux
>  Workstations and advanced, Parallel Solutions
>  http://www.blacklablinux.com/
>
> On Fri, 21 Jan 2000, Tom Rini wrote:
>
> >
> > ---
> > Tom Rini (TR1265)
> > http://gate.crashing.org/~trini/
> >
> >
>
>

--
AOL SAPI    jackal@aol.net    jackal@kmfms.com    703.265.0908   AIM:jackal242
http://jackal.fudge.org        `I was never more certain of how far away I was
from my goal than when I was standing right beside it.' - Ethan Hawke, Gattaca


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: USB problems in 2.2.14pre9

[bob]

Tom Rini <trini@kernel.crashing.org> Wrote:
>On Fri, 21 Jan 2000, Stephen Edie wrote:
>
>>
>> Oh yes, I am using a USB keyboard right now.  It seems to happen whenever
>> more than three keys are simultaneously down...  When the fourth key is
>> pressed, it isn't reported.  At this point, releasing any of the four keys
>> causes duplicated key strokes to be reported.  Strange.
>
>Using a more current stack (2.3.40) I can use up to 6 keys (ie press 'em
>one after another and the last pressed one works) and the 7th is ignored.

I reported this several months ago. It has affected all kernels with the
new USB driver (post 2.2.6). I believe it is a side effect of the
USB-ADB translation. In effect you only get 2-key rollover instead of
n-key rollover. Haven't seen that since the 70's :)

It will be interesting to see if the 2.3.40 kernel works better. Judging
by Tom's comment, it looks like it's now 6-key rollover ;)

It's REAL easy to get the bad behavior by typing cd<space>
I ALWAYS get cdcd with this sequence. (note that the c and d keys aren't
released before the space is hit). It appears I'm not the ONLY one who types
like this....

Bob
--
Robert E. Brose II    N0QBJ
http://www.jriver.com/~bob/
bob@kunk.jriver.com

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Re: USB problems in 2.2.14pre9

[Nelson Abramson]

bob@kunk.jriver.com wrote:

>
> It will be interesting to see if the 2.3.40 kernel works better. Judging
> by Tom's comment, it looks like it's now 6-key rollover ;)
>
> It's REAL easy to get the bad behavior by typing cd<space>
> I ALWAYS get cdcd with this sequence. (note that the c and d keys aren't
> released before the space is hit). It appears I'm not the ONLY one who types
> like this....

I type cd like that too....I get the cdcd or the cdc a lot too....you're not
alone!! :-)

--Nelson Abramson

--
"Every time you get a dialog box you don't understand, you ought to get a nickel
 from Microsoft, and every time it crashes, you should get a dollar.  That would
 make Bill Gates homeless and me a rich man." --Ben Schneiderman, University of
Maryland computer science professor
Courtesy of 1984: http://www.1984-online.com/facts.html


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Re: USB problems in 2.2.14pre9

[Stephen Edie]

Hmm,

> But I'm only pressing a maximum of _two_ keys "cd" and it's coming out as
> "cdcd".
>
> It's a real pain cause I do "cd" a lot.

You are probably hitting three keys:  "cd<space>"  Anyway, this problem
occurs at the console as well as in X, however, strangely it is much worse
at the console.

Stephen

Terra Soft Solutions, Inc.
 Yellow Dog Linux
 "The Ultimate Companion for a Dedicated Server"
 http://www.yellowdoglinux.com/

 Black Lab Linux
 Workstations and advanced, Parallel Solutions
 http://www.blacklablinux.com/


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Re: USB problems in 2.2.14pre9

[brad allison]

On Tue, 25 Jan 2000, Stephen Edie wrote:

> Hmm,
>
> > But I'm only pressing a maximum of _two_ keys "cd" and it's coming out as
> > "cdcd".
> >
> > It's a real pain cause I do "cd" a lot.
>
> You are probably hitting three keys:  "cd<space>"  Anyway, this problem
> occurs at the console as well as in X, however, strangely it is much worse
> at the console.
>

Oh it's driving me crazy!

# cdd -
cdd: Command not found.
# cdcd
cdcd: Command not found.
# cdcd
cdcd: Command not found.

Everyday.. over and over.

This is a bug that only affects fast typest.

-b


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