Hi guys, I really have a problem with a kernel extension. Could you help me with the provided information? I know this question has been discussed in this mailing lists most probably a lot of times but following some conversations I dont get how to proceed. My computer is an iMac G3/400 DV with 512MB RAM (2 x 256MB), under Mac OS X 10.1.4. My internal modem was broken and instead of repair it I bought a 3Com OfficeConnect Business Modem, external USB and compliant with MacOS as its built by USR Robotics but not specifically indicated for Mac OS X, but its not a windmodem. It doesnt matter if the modem is connected directly to the free USB port or through an 7-port Keyspan USB hub connected to the free USB. I get two or three very good connections and after that I loose the control of the modem. This loose of control always occurs when the line has dropped and the Internet Application thinks is connected then I click Cancel (Disconnect) and the Internet Application says "Disconnecting..." when the modem has hang up minutes ago and I can not connect again. Then when after just selecting restart I get this kernel panic (two records from different days and with two different versions of Mac OS X, 10.1.3 and 10.1.4, indeed the problems appear since update to 10.1.3 where IOSerialFamily.kext was modified to the current version 5.3.0d14). Sometimes switching off and on the modem, or unplug / plug, makes the iMac sees it again and connect to Internet but in most of cases the only solution is to restart and get the kernel trap. Once is plugged in the 7-port Keyspan USB Hub is shown in the Active Ports in Network System Preferences, not added driver, that's the reason I am thinking the Mac OS X kernel drivers are being used for my modem but I don't understand the reason IOSerialFamily is used when the modem is an USB device. Indeed an HP DeskJet 950C printer is connected to the same USB hub and no problems but it's configured as USB interface (what are the differences between USB device and USB interface?) with the specific driver HP provides. Looking at Kernel Extensions I got IOSerialFamily.kext is 2001-07-30 5.3 (5.3d14) and IOUSBFamily.kext is 1.8.7. Are they OK for 10.1.4? Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x00000060 PC=0x135cdc40 Latest crash info for cpu 0: Exception state (sv=0x135d4000) PC=0x135CDC40; MSR=0x00009030; DAR=0x00000060; DSISR=0x40000000; LR=0x135cc30c; R1=0x0d203be0; XCP=0x0000000c (0x300 - Data access) Backtrace: 0x135cd96c 0x135cc30c 0x000b81d8 0x000b5484 0x00191bc8 0x00092448 0x0008e600 0x00000000 Kernel loadable modules in backtrace: com.apple.iokit.IOSerialFamily(5.3.0d14)@0x135c9000 Proceeding back via exception chain: Exception state (sv=0x135d4000) previously dumped as "Latest" state. skipping... Exception state (sv=0x135f0000) PC=0x700035DC; MSR=0x0000d030; DAR=0x000cf000; DSISR=0x40000000; LR=0x700035a4; R1=0xbffff450; XCP=0x00000030 (0xC00 - System call) Kernel version: Darwin Kernel Version 5.3: Thu Jan 24 22:06:02 PST 2002; root:xnu/xnu-201.19.obj~1/RELEASE_PPC Memory access exception (1,0,0) Waiting for remote debugger connection. Options..... Type ------------ ---- continue.... 'c' reboot...... 'r' Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x00000060 PC=0x135cec40 Latest crash info for cpu 0: Exception state (sv=0x136de000) PC=0x135CEC40; MSR=0x00009030; DAR=0x00000060; DSISR=0x40000000; LR=0x135cd30c; R1=0x0d18bbe0; XCP=0x0000000c (0x300 - Data access) Backtrace: 0x135ce96c 0x135cd30c 0x000b8c98 0x000b5f44 0x00192b84 0x00092f08 0x0008f0c0 0x5f313953 Kernel loadable modules in backtrace: com.apple.iokit.IOSerialFamily(5.3.0d14)@0x135ca000 Proceeding back via exception chain: Exception state (sv=0x136de000) previously dumped as "Latest" state. skipping... Exception state (sv=0x13823000) PC=0x700035DC; MSR=0x0000d030; DAR=0x0002b90; DSISR=0x40000000; LR=0x700035a4; R1=0xbffff7a0; XCP=0x00000030 (0xC00 - System call) Kernel version: Darwin Kernel Version 5.4: Wed Apr 16 09:27:47 PST 2002; root:xnu/xnu-201.19.3.obj~1/RELEASE_PPC Memory access exception (1,0,0) Waiting for remote debugger connection. Options..... Type ------------ ---- continue.... 'c' reboot...... 'r' Thanks in advance, Alberto am.uriarte@terra.es _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.