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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9"> <TITLE>The Linux keyboard and console HOWTO: Hardware incompatibility</TITLE> <LINK HREF="kbd.FAQ-23.html" REL=next> <LINK HREF="kbd.FAQ-21.html" REL=previous> <LINK HREF="kbd.FAQ.html#toc22" REL=contents> </HEAD> <BODY> <A HREF="kbd.FAQ-23.html">Next</A> <A HREF="kbd.FAQ-21.html">Previous</A> <A HREF="kbd.FAQ.html#toc22">Contents</A> <HR> <H2><A NAME="s22">22. Hardware incompatibility</A></H2> <P> <!-- keyboard!hardware incompatibilities --> <!-- incompatibility!keyboard-related --> <P>Several people have noticed that they lose typed characters when a floppy disk is active. It seems that this might be a problem with Uni-486WB motherboards. <P>Tjalling Tjalkens (<CODE>tjalling@ei.ele.tue.nl</CODE>) reports very similar problems with "a no-brand GMB-486 UNP Vesa motherboard with AMD 486DX2-66 CPU" - during floppy activity some keystrokes are lost, during floppy tape streamer (Conner C 250 MQ) activity many keystrokes are lost. <P>Some people experience sporadic lockups - sometimes associated to hard disk activity or other I/O. <P>Ulf Tietz (<CODE>ulf@rio70.bln.sni.de</CODE>) wrote: `I have had the same problems, when I had my motherboard tuned too fast. So I reset all the timings ( CLK, wait statements etc ) to more conventional values, and the problems are gone.' <P>Bill Hogan (<CODE>bhogan@crl.com</CODE>) wrote: `If you have an AMI BIOS, you might try setting the Gate A20 emulation parameter to "chipset" (if you have that option). Whenever I have had that parameter set to any of the other options on my machine ("fast", "both", "disabled") I have had frequent keyboard lockups.' <P>There may be a relation between keyboard problems and the video card in use. <P>Shawn K. Quinn (<CODE>skquinn@wt.net</CODE>) wrote: `I have a Zeos Pantera Pentium-90 that originally came with a Diamond Stealth 64 S3-based video card. Under X I frequently got q's inserted into my text (how annoying) especially if I typed very fast (during Netrek for instance, even more annoying because guess what that does :-( ). Switching to a Creative Labs Graphics Blaster MA202 solved the problem. I'm assuming the Stealth 64 did something funny with the timings.' <P> <HR> <A HREF="kbd.FAQ-23.html">Next</A> <A HREF="kbd.FAQ-21.html">Previous</A> <A HREF="kbd.FAQ.html#toc22">Contents</A> </BODY> </HTML>
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