Messages in this thread | | | Date | Tue, 26 Mar 1996 11:16:21 -0500 (EST) | From | Dale Scheetz <> | Subject | Re: Linux reboot |
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On Tue, 26 Mar 1996, William E. Roadcap wrote:
> On Tue, 26 Mar 1996, PAER LINDH wrote: > > > > > I have always wondered why Linux never reboots by itself when I type > > reboot or press CTRL-ALT-DEL. I will have to press the reset button > > manually. It just stops after the text > > > > rebooting > > > > has appeared on the screen. This has happened ever since I switched CPU > > to a AMD DX4-120. Before on my AMD DX2-66 it rebooted fine. > > In MS-DOS/Windows the rebooting works fine. > > I have had this problem and was unable to fix it. It's nothing to really > worry about, you may have to live with it. > > Did you also change motherboards? In my system, the BIOS had some weird > setting that dealt with the using the keyboard controller or chipset > controller for reset. Setting it either way made no difference. I had to > assume that the problem was an oddball motherboard design and I lived > with it. I have since switch motherboards (NOT CPU) and Linux is able to > reset ok. > > I suspect the reason DOS/Windows is able to reset your board is because > those programs probably use the BIOS to reset, Linux does not. This is > an excerpt from the Linux sources. > > /* > * This routine reboots the machine by asking the keyboard > * controller to pulse the reset-line low. We try that for a while, > * and if it doesn't work, we do some other stupid things. > */ > > So it seem the reset process is just a gamble. It's a good gamble, but may > not work with all hardware. > > Don't worry. If your filesystems are unmounted and especially if the > system seems to be locked up after you see "rebooting" everything will be > fine. > I boot my Linux partition using Loadlin from DOS. When I boot directly into Linux, reboot works fine (most of the time). However, if I boot into DOS first (doing nothing else) and then run Loadlin I experience the same results as PL has reported. This indicates that something in memory is not as Linux expects it when reboot executes. As I also have had isolated instances of reboot hanging when I booted correctly, I suspect that it is possible to break this memory connection without the help of DOS.
Parity on Dudes,
Dwarf
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