Red Hat Bugzilla – Bug 44021
hangs on warm reboot
Last modified: 2007-04-18 12:33:37 EDT
From Bugzilla Helper: User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.4.2-2 i586) Description of problem: The machine (Compaq Presario 1255, AMD K6-2, 333Mhz 64mb) hangs AFTER a warm reboot. I.E. the kernel stops everything, no errors are encountered. After the message Please standby.[...] the screen goes blank (as normal) but then the graphic lilo is spoiled (black dots everywhere). After 2-3 secs. the machine starts loading the kernel, the console is also spoiled (strange characters) and freezes shortly after writing Booting kernel [or whatever, I don't remember]. The only solution is a hard boot. I have tried to pass the options reboot=c (and also h,b,w) but no changes. The problem occurs when rebooting from any runlevel (i.e. it is not a X problem, should be the kernel). Unfortunately there are no error messages in any of the logs. How reproducible: Always Steps to Reproduce: 1.Turn on 2.Log in as root 3.shutdown -r now (or ctrl+alt+del at any stage) Actual Results: The machine hangs AFTER reboot. Additional info:
This sounds like a bios bug. Could you try passing "apm=realmode" to the lilo prompt of the "first" boot (eg the boot where you type reboot) ?
I tried the suggestion apm=realmode but no difference. I have recompiled disabling the kernel hacking options (Memory mapper I/O debugging and Magic SysRq Key) and the result are somewhat encouraging and confusing. 1) Now the new kernel can safely warm reboot (wreboot) from runlevel 1 BUT NOT runlevel 3. 2) For some reason (!!?) now also the old kernel can reboot from runlevel 1 (and not from runlevel 3 or higher). Maybe the bug is in some module. Did I do correctly? make mrproper; make menuconfig (using /usr/src/linux2.4/config/kernel-2.4.2.i586.config); make dep; make bzImage; make modules; make modules_install, copy the image in /boot/mykernel, added to lilo.conf, lilo. For some strange reason it still complained about unresolved symbols until I copied /usr/src/linux-2.4/System.map in /boot/System.map.mykernel and changed the symlink; but this is never told in any howto (maybe I am confused; but I am no geek, I just read the howtos!). 3) I tried to enter Interactive mode and excluding everything I seem to be able to wreboot (both kernels). 4) I tried to exclude only apmd but doesn't solve. [5) For information, even if I abort installation from cdrom at any early stage and wreboot, the problem persists.] Very depressing. Thanks anyway P.S. (I'll probably revert to 7.0 because also rp3 doesn't work as it should; maybe is only my impression but I get more problems with the latest distributions (from 5.1 on))
Closing out as a BIOS issue, not something we could fix