A system I built about a month ago is hanging whenever I do any significant disk I/O. In particular, the system will hang when I use tar to transfer a bunch of files from an NTFS-formatted disk to a reiserfs-formatted disk (using tar). This is a hard hang -- the mouse pointer freezes and nothing except a hardware reset will bring the system back. There was an earlier hang that was resolved. When I was installing SuSE 9.2 the system would hang while installing the software packages from the DVD-RW drive. I goggled and found there is a known problem with the ASUS A7N8X-E motherboard: the workaround is to add the boot option "acpi_skip_timer_override". Apparently this is fixed in kernel 2.6.10, but I haven't seen that available yet. I'm still running 2.6.8-24.10. I've added just one PCI card, a Promise Technology disk controller, with two disks (one on each controller). The motherboard primary IDE controller has 2 disks as well; the secondary controller has just a DVD-RW. The video card is an AGP GeForce FX 5500. Here's output of lspci. Any suggestions appreciated. Thanks. -Jeff linux:~ # lspci 0000:00:00.0 Host bridge: nVidia Corporation nForce2 AGP (different version?) (rev c1) 0000:00:00.1 RAM memory: nVidia Corporation nForce2 Memory Controller 1 (rev c1) 0000:00:00.2 RAM memory: nVidia Corporation nForce2 Memory Controller 4 (rev c1) 0000:00:00.3 RAM memory: nVidia Corporation nForce2 Memory Controller 3 (rev c1) 0000:00:00.4 RAM memory: nVidia Corporation nForce2 Memory Controller 2 (rev c1) 0000:00:00.5 RAM memory: nVidia Corporation nForce2 Memory Controller 5 (rev c1) 0000:00:01.0 ISA bridge: nVidia Corporation nForce2 ISA Bridge (rev a4) 0000:00:01.1 SMBus: nVidia Corporation nForce2 SMBus (MCP) (rev a2) 0000:00:02.0 USB Controller: nVidia Corporation nForce2 USB Controller (rev a4) 0000:00:02.1 USB Controller: nVidia Corporation nForce2 USB Controller (rev a4) 0000:00:02.2 USB Controller: nVidia Corporation nForce2 USB Controller (rev a4) 0000:00:04.0 Ethernet controller: nVidia Corporation nForce2 Ethernet Controller (rev a1) 0000:00:05.0 Multimedia audio controller: nVidia Corporation nForce MultiMedia audio [Via VT82C686B] (rev a2) 0000:00:06.0 Multimedia audio controller: nVidia Corporation nForce2 AC97 AudioControler (MCP) (rev a1) 0000:00:08.0 PCI bridge: nVidia Corporation nForce2 External PCI Bridge (rev a3) 0000:00:09.0 IDE interface: nVidia Corporation nForce2 IDE (rev a2) 0000:00:0d.0 FireWire (IEEE 1394): nVidia Corporation nForce2 FireWire (IEEE 1394) Controller (rev a3) 0000:00:1e.0 PCI bridge: nVidia Corporation nForce2 AGP (rev c1) 0000:01:04.0 Ethernet controller: Marvell Technology Group Ltd. Yukon Gigabit Ethernet 10/100/1000Base-T Adapter (rev 13) 0000:01:08.0 Unknown mass storage controller: Promise Technology, Inc. PDC20268(Ultra100 TX2) (rev 02) 0000:01:0b.0 RAID bus controller: Silicon Image, Inc. (formerly CMD Technology Inc) SiI 3112 [SATALink/SATARaid] Serial ATA Controller (rev 02) 0000:03:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5500] (rev a1)