Hello! I have upgraded a system from Linux 3.5.6 to 3.6.4, and now I get a kernel panic on boot. It's an i686 system. I have tried to download to 3.6.3 and 3.6.2, and they also panic. 3.5.6 boots fine, but I had to remove nvidia and virtualbox. Then upgraded again to 3.6.4, got the kernel panic, and downgraded again (just to discard nvidia or virtualbox) I don't know how to solve this. Messages in screen seem to be related to scsi. I have removed an Adaptec card, but it makes no difference. I can't get (or can't find) a log, but there are things like: Oops: 0000 [#2] PREEMPT SMP Process scsi_eh_2 (pid: 57, ... A lot of lines with references to libata and pata_acpi. This is the hardware seen by lspci. 00:00.0 Host bridge: Intel Corporation 82915G/P/GV/GL/PL/910GL Memory Controller Hub (rev 04) 00:01.0 PCI bridge: Intel Corporation 82915G/P/GV/GL/PL/910GL PCI Express Root Port (rev 04) 00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 02) 00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 1 (rev 02) 00:1c.1 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 2 (rev 02) 00:1c.2 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 3 (rev 02) 00:1c.3 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 4 (rev 02) 00:1d.0 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 (rev 02) 00:1d.1 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #2 (rev 02) 00:1d.2 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #3 (rev 02) 00:1d.3 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #4 (rev 02) 00:1d.7 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d2) 00:1f.0 ISA bridge: Intel Corporation 82801FB/FR (ICH6/ICH6R) LPC Interface Bridge (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) IDE Controller (rev 02) 00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA Controller (rev 02) 00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus Controller (rev 02) 01:00.0 VGA compatible controller: NVIDIA Corporation G84 [GeForce 8600 GS] (rev a1) 04:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8050 PCI-E ASF Gigabit Ethernet Controller (rev 15) 06:01.0 Multimedia controller: Philips Semiconductors SAA7134/SAA7135HL Video Broadcast Decoder (rev 01) 06:02.0 Ethernet controller: Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 (rev 0c) The processor is an old P4 HT. Has been working fine for years, and still does with the previous kernel. Any ideas? Thanks, Guillermo Leira