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- From: gdt@ginger.lcs.mit.edu (Greg Troxel)
- Newsgroups: comp.unix.bsd
- Subject: Dell 325N notebook: 0.1 boots, power managegement seems ok, SLIP speed
- Message-ID: <GDT.92Jul29144848@ginger.lcs.mit.edu>
- Date: 29 Jul 92 19:48:48 GMT
- Sender: news@mintaka.lcs.mit.edu
- Distribution: comp
- Organization: /u/gdt/.organization
- Lines: 51
-
- I booted the 0.1.cgd dist.fs floppy on a DELL 325N (386SL-25/4Mb
- ram/60Mb disk) at a store; it seemed to run fine (I didn't try to
- write onto the hard drive). It took 102 seconds to boot from the
- floppy (Ctl-Alt-Del to '#' prompt).
-
- The "power management" features seemed to work under 386BSD; after a
- while the screen blanked, and typing brought the system back. The
- suspend button caused the suspend light to flash and the display to
- blank; after pushing it again 386BSD was still running. I was able to
- get to the "power managment control screen" (via Alt-F1) while running
- 386BSD, and return. I haven't bought a 325N yet, though, and I'm not
- completely sure I understand what is going on.
-
- I have seen comments that (in the non-DOS world) only the Tadpole
- Solaris supports "notebook power management". However, from what I
- can tell 386BSD already only writes the superblock on sync if the
- filesystem has been modified (see
- /usr/src/sys.386bsd/ufs/ufs_vfsops.c, procedure ufs_sync), and thus
- doesn't need any "support" for disk/screen power saving, at least with
- the Dell 325N. Turning down the clock speed in the idle loop is
- another matter, and this may be what is meant by OS support for power
- management.
-
- I am about to purchase a notebook on which to run 386BSD, and I have a
- few questions/worries (the Dell 325N seems totally winning except 1)
- it only has 1 serial port 2) it doesn't have a 16550 3) it doesn't
- have an expansion bus connector):
-
- 1) Will SLIP under 386BSD will work at a reasonable speed (19200 or
- 9600) on a 386sx-25 without a 16550A UART? (More precisely, have
- you gotten it to work?) A friend reports that 19200 works on a
- 486dx-40, but 38400 doesn't. Thus it seems that 9600 on a 386sx-25
- might not work very well.
-
- 2) Are there notebooks that have 16550A UARTs built in, or socketed
- 8250s, and can be purchased with a 120 Mb (or bigger) disk? Dell
- says that the UART on the 325N is soldered in place. Zeos claimed
- that their notebook had a 16550 (is this true?), but the biggest
- disk they carry is 60 Mb.
-
- 3) Are the power management schemes of various notebooks dependent on
- DOS/BIOS, or will they work under 386BSD?
-
- Please respond to me, and I will summarize and post.
-
- Greg Troxel (N1DAM)
- <gdt@ginger.lcs.mit.edu>
- --
- 73 de n1dam
- Greg Troxel
- <gdt@allspice.lcs.mit.edu>
-