Q: Linux system time is set to the bios time at startup, the clock runs fine while the system is on, then on shutdown when it tries to sync the Linux system time with the bios time, it resets the bios to the startup time. It even sometimes sets the bios settings back to default values and the date to Jan. 1999. I've tried commenting out the hwclock code in /etc/init.d/halt; but Linux continues to set the bios to startup time. Hwclock didn't work properly on my system. When I ran hwclock --show, I got nothing. I found a later version 2.18 on the web and installed that. Now, hwclock --show --fast gives the time; but the time still gets messed up on shutdown. If I could just turn off clock sync at shutdown, I would be happy. I rarely connect to the internet with Linux; but I tried ntp anyway, and it worked but didn't help either. My bios clock runs fine in DOS and Windows, and I think the CMOS battery is OK. I'm using rehat 8.0 with a gigabyte GA 5-AX supersocket 7 motherboard, the latest bios software, and an AMD K6-2 400mhz processor. I've had this problem with Red Hat 7.3 and Mandrake 8.2 also. - JD A: A: A short answer: An I/O conflict with my ISA modem was disabling my ISA real time clock. I turned off uneeded ports in the BIOS, the RTC and hwclock program now work normally, and the system keeps perfect time. A more detailed explanation of the RTC problem is on the Home Desktop page. - JD