I have a a Dell Optiplex 755 with WinXPPro SP3, 2GB RAM and an Intel Core 2 Duo E4600, and it is unreliable for BOTH Wake on LAN and Wake on Ring.   Please note that BOTH Wake on LAN and Wake on Ring are having problems -- they do NOT always wake the PC when it is in sleep/standby/suspend mode.

When the PC is in sleep mode (S1 or S3), they work some of the time but not all of the time, and I'd like them to be 100% reliable.

These may be two different problems, but your advice will be appreciated. (Also, if I should post in a different forum, please advise.)

My Network Card is an Intel 82566DM-2 Gigabit Network Connection, and I recently upgraded its drivers using "generic" PROXP.exe from the Intel website although this has not helped the problem. When I'm on the computer, I don't feel or see a difference - the network and internet link seems to be working well, same as before. The specific driver file e1e5132.sys is now version 9.12.36.0 from 2008 -- it used to be version 9.8.20.0 from 2007. But, as I say, Wake on LAN from Sleep was not and is still not reliable, before and after the driver update.

In Settings .. Network Connections ... Local Area Connections ... Properties ... Configure ... Power Management, all the Wake on LAN options are checked ON:

- Wake on Directed Packet
- Wake on Magic Packet
- Wake on Magic Packet from Power Off Sate
- Wake on Link

The NIC card's Diagnostic checks are all OK.

My fax modem card is Conexant D850 PCI V.92 Modem, and I have recent drivers dated 7/27/07, version 7.67.0.50. In Settings ... Phone and Modem Options ... Modems ... Properties, "Allow this device to bring the computer out of standby" is checked ON.  Wake on Ring was unreliable with the previous drivers, and it is still unreliable with the current drivers.

My BIOS is now version A15, the most recent version, and it is set to PERMIT Wake on LAN and Wake on Ring.  I also have a choice of S1 or S3 for Sleep, and the problems are the same regardless which one I choose.

By the way, these are my screensaver and power management settings:

Screensaver: XP logo after 9 minutes; do NOT show welcome screen on resume.

Power Settings: Home/Office Desk; Turn Off Monitor after 10 mins; Turn Off Hard Disks Never; System Standby after 20 mins; System Hibernates Never; Do NOT prompt for password when computer resumes from standby.

What to do? If it's a BIOS problem, how can I fix?

Thanks.