Date: Wed, 19 Aug 1998 13:27:58 -0700 (PDT) From: Tom Bartol <bartol@salk.edu> To: Jonathan Lemon <jlemon@americantv.com> Cc: questions@FreeBSD.ORG Subject: Re: ThinkPad 770 hangs during boot -- available memory probe problem? (was: trouble with sio on Thinkpad 770) Message-ID: <Pine.BSF.3.96.980819132647.15523A-100000@cole.salk.edu> In-Reply-To: <19980819140829.08171@right.PCS>
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Thanks! I'll give that a try and report back... Tom On Wed, 19 Aug 1998, Jonathan Lemon wrote: > On Aug 08, 1998 at 09:37:39AM -0700, Tom Bartol wrote: > > installed 3.0-970807-SNAP. I could now boot my system. I then configured > > a custom kernel with this system and after more investigative work found > > that if I set MAXMEM = (96*1024) in the kernel config file (recall that > > these older systems still required the MAXMEM parameter for >64MB to be > > recognized) then my system would hang on boot, but if I set MAXMEM = > > (95*1024) everything works perfectly, even the serial port. :-) I guess > > that more recent kernels can somehow get the correct available memory > > value on their own by some means (perhaps from the BIOS) and that this > > algorithm works for some BIOSes but not others and could be fixed to work > > with the new BIOS I installed on my 770, or perhaps the 770 BIOS is not > > reporting the correct value when probed by FreeBSD. So, the question is: > > what's going here and what should I do to help narrow it down further so > > that the appropriate action can be taken. > > If you have -current sources newer than 980324, then you might > want to try compiling a kernel with ``options "VM86"'', instead > of MAXMEM. This enables some functions which query the BIOS > directly for the memory size on bootup, and might fix your > problem. > -- > Jonathan > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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