Hello, I'm hoping that some kind soul can help me diagnose what's going on here, or at least point me to another resource. Several weeks ago, I upgraded (first via zypper dup, then with a re-install) from 11.2 to 11.3 on a system with the above mobo. Since then, I've encountered all kinds of difficulties that I now believe to all be ACPI related. Note the the system had been very stable running 11.2, but I wanted the new Xorg driver for my ATI 4350 card so that I could take advantage of the accelerated driver and associated eye candy. Initially, I noticed network problems, and kernel messages in /var/log/messages with CPU#n suck messages. I've attached a snippet below. Aug 13 13:30:02 faramir kernel: [ 4331.903317] BUG: soft lockup - CPU#0 stuck for 139s! [swapper:0] I eventually noticed that *most* these included the rtl8169 in the call stack. After some Googling, with no luck, I picked up a used Intel 82545GM from eBay to replace the built-in RealTek - it's a better chipset anyway, right? Well, after this, the above error traces went away, but not all of the bad behaviors. Remaining were the very long boot times (10 minutes) and random system hangs (5-30 seconds). I discovered that any keypress (i.e Num-Lock) would "unstick" the system, I surmised by generating an interrupt. Since then, I've been trying to play with combinations of ACPI=xx APM=xxx and pci=noacpi. After many experiments, I've the only combination that I could find that would make my system run well is "apm=off pci=noacpi acpi=off" -- in particular, "acpi=off". I've tried other ACPI options, but, at least so far, to no avail. The main downside that I've discovered to "acpi=off" is that my 4 CPU cores (AMD Phenom(tm) II X4 925 Processor) are pegged at 2812.342 MHz, with my CPU fan running full-tilt to keep 'em cool. I've also attached the output of 'lspci' and 'dmidecode'. Let me know if there's anything else that I can provide, as well. Just for the record, I'm certainly *not* a newbie, and I'm willing to experiment and/or debug. Thanks in advance, -Nick