With a 2.4.1-pre10 kernel, I noticed that /dev/cpu/microcode was created as a file, and note as a node in the devfs. So, I made this very little patch to correct this: --- microcode.c Thu Dec 28 06:28:29 2000 +++ microcode.c Wed Jan 24 04:47:08 2001 @@ -120,7 +120,7 @@ MICROCODE_MINOR); devfs_handle = devfs_register(NULL, "cpu/microcode", - DEVFS_FL_DEFAULT, 0, 0, S_IFREG | S_IRUSR | S_IWUSR, + DEVFS_FL_DEFAULT, MISC_MAJOR, MICROCODE_MINOR, S_IFCHR | S_IRUSR | S_IWUSR, µcode_fops, NULL); if (devfs_handle == NULL && error) { printk(KERN_ERR "microcode: failed to devfs_register()\n"); This should be OK... I cannot test this feature as I don't have a PIII, but a K6-II... I'll try... Just to know... I was wondering why /dev/cpu/mtrr was created as a file, not a node, when I found this... For mtrr, it seems to be normal, as I didn't find any informations relative of Major/Minor for this device... Regards. Jocelyn Mayer ¢éì¹»®&Þ~º&¶¬+-±éݶ¥w®Ë±Êâmébìdz¹Þ)íæèw*jg¬±¨¶Ý¢j/êäz¹Þà>W±êÞiÛaxPjØm¶ÿà -»+ùd_