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Linux, USB keyboard pausing.

V

vash

Platinum Member
The initial title of this topic dealt with (what I thought) was the SCSI addition to my system and the frequent pausing I would experience on the cli. I would be typing, just pecking away, then all of a sudden, lose all input. The last time this happened, I unpluged and plugged back the keyboard and I had input again! Now this is causing me to question which USB driver I should be using for my chipset.

With the sources merged from Gentoo, the default of UHCI is selected. Is this appropriate for a 760MPX chipset? Or should I be looking at the OHCI one instead?

vash
 
There are two aic78xx drivers in the kernel, which driver are you using? What is your max command queing depth at?

I have 4 SCSI machines and none of them exhibit anything like that.
 
Thanks for the reply, Nothinman, but it looks like USB is more of the culprit. Bumping for some more visibility. I did recompile the kernel for OHCI support and the pauses do still happen, but the system does come back on a more normal basis (i.e. does not hang, but will pause for a few seconds at a time). Gotta be someone that knows about this.

vash
 
This is the latest emerge'd kernel from Gentoo, its 2.4.19pre7, using the pre-empt and low latency patches for the Gentoo 1.2 distribution. There are other tweaks for the kernel, but I don't know quite what. I am using the gentoo-sources build, so there is no support for XFS.

Thanks for the replies. This is the kind of question that (sometimes) is a bit difficult to put into words, when you aren't highly familiar with running Linux 24/7.

vash
 
Try 2.4.19, if that doesnt have problems, try 2.4.19 with the pre-empt patches, if that doesnt have problems try it with the low latency patches. Just keep switching around the configuration until you find something that works. If none of it works, try 2.4.18.
 
A bit more an update on this. With the built-in UHCI driver, I have the pauses/pausing. In the manual for the book, the USB is clearly labeled as UHCI. When I use the OHCI driver, life is fine and dandy, so it looks like UHCI is the real culprit. I'll probably post this info on the Gentoo forums, maybe someone else can shed some light on the subject.

vash
 
AFAIK, my Compaq uses both OHCI and UHCI in the same machine. Perhaps compile your kernel with both of them built-in.
 
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