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Newsgroups: comp.os.386bsd.questions Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!bunyip.cc.uq.oz.au!munnari.oz.au!ihnp4.ucsd.edu!swrinde!pipex!sunic!EU.net!uunet!monoli!relay1!csoft!elvisti!stesin From: stesin@Elvisti.Kiev.UA (Andrey Stesin) Subject: Re: Keyboard Lockup Problems Organization: Elektronni Visti Date: Fri, 01 Jul 1994 03:22:39 GMT Message-ID: <1994Jul01.032239.350@Elvisti.Kiev.UA> X-Newsreader: TIN [version 1.2 PL1] References: <2ustmq$4fm@blkbox.blkbox.COM> Lines: 51 Cameron Bevis (cbevis@blkbox.com) wrote: : Hello all. I have a problem wherein the keyboard locks up occasionally. : I can dial into the system after a lockup, and everything works great, : just no keyboard input from the console. This is a very duplicable : problem if I just bang on CapsLock or NumLock really quickly and also : happens when switching to/from virtual screens. This question seems to be : popping up intermittently in the "questions" newsgroup from since at least : December. I have absolutely the same symptoms with Intel 486dx-33. A couple of keyboards were tested with this box - the same! I wrote to FreeBSD mailing lists, and to the author of 'syscons' driver, but there wasn't any solution. : Things I have tried: : pcons and sysons: same thing : calling in from tty00 and "echo"ing to that console: same thing The same! :( : killing caches, shadow bios Killing the external cache helps (a little) but the box becomes too slow after this, almost unusable! : The rest of the solutions in the group regarding this question have : been installation related, with one exception: : "put a 250ms delay before any port I/O involving the LEDs" This is a first realistic proposal I know about. Folks told me another interesting thing about the LEDs. They said: "If you want to determine - is the processor internal cache good or bad - try to run ndiags.exe (from NU) on this box. If the box will hang totally while running the keyboard LED test - your 486 chip has a hardw. bug in internal cache implementation!" I can say that the Packard Bell machine we had here hangs up under ndiags LED tests, but Intel doesn't. : Has anybody done this? Where in the kernel sources/config is this done? : Were there any successes not mentioned in the group? I didn't new the way; and I'm not sure I know it now... Please if someone has any new info about this or maybe a fix - I'll be glad to test it. Thanks in advance -- Andrew Stesin.