Date: Mon, 19 Feb 1996 23:56:12 +0000 () From: Alain Brauner <alainb@freegate.gna.org> To: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de> Cc: FreeBSD-current users <freebsd-current@FreeBSD.ORG> Subject: Re: Keyboard lockout on 2.x.x Message-ID: <Pine.NEB.3.91.960219230830.210D-100000@freegate.gna.org> In-Reply-To: <199602190811.JAA11333@uriah.heep.sax.de>
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Hi, Maybe i shall also redirect this mail to hackers. On Mon, 19 Feb 1996, J Wunsch wrote: > As Kent Hamilton wrote: > > > > > > When exactly does it lock up? > > > > Ohh, sorry, I've seen this mentioned here before so I guess I thought > > it was a well known problem. I'm using syscon and when flipping to a > > different vt you'll get locked out. > > Does this happen for all keyboards? Does disconnecting/reconnecting > the keyboard help? > I have this problem too, this before 2.0R and i still have it in 2.1R, with several different hardware. > Keyboard lockup during VT switch is most likely due to a collision on > the keyboard interface arising out of simultaneously sending a > character code, while the driver is sending a SET LEDS command to the > keyboard. When i search in the differents lists archives of FreeBSD, i found that it may have something to do with one or more of the following : - The Screen saver ? - Lot's of Paging when we "VT switch" ( with X11 ) We can reproduce this problem when trying to switch while starting X at the same time or when we are under heavy load in X. > The keyboard serial interface hasn't been designed to be two-way, but > later (for the PC/AT) been used for this. Since you can rlogin into > the machine, try compiling the kbdio(8) hacker's tool from > /usr/src/usr.sbin/pcvt/kbdio, and see if you could also issue a > keyboard reset. Sorry, no man page, only the usage help (try -h). > Good news. Some time ago we where able to switch between VTs with an early syscons command comming from FBSD 1.X . I remember issuing this syscons command on my good old serial terminal, to get my console keyboard VT switching resurected. I'm sure that this can be re-implemented in vidcontrol since i have the feeling that this is used in the install floppy. I have to mention another intermittent Vt switching problem since 2.0.5-SNAP-XXX ( using syscons ). When i switch from X11 to text, i have to press to CTRL or ALT keys to reset my keyboard to a sane state. I guess this came from X11 key-press/key-release discipline; key-release is catched ( and ignored ) while doing CTRL-ALT-Fn. I try to use SVR4 vt switching mode in my /etc/XF86config, but it hasn't fixed the problem. Anyway, *nothing* can make me change to another OS :-) bye. -*- FreeBSD:<Live free or die> Alain Brauner: alainb@freegate.gna.org 93200 St DENIS France
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