I reply to my own message, providing more details, hoping that anyone here could give a hint or the solution. During bootup on ip32, since 2.4.24-rc1, the system loop printing a message about unexpected interrupt #13. (see transcript below.) I enabled more debug in the kernel, and studied the code. What I understood is that interrupt #13 from CRIME means that the system should check on MACEISA for the real interrupt. The interrupt start appearing just after executing the code psmouse_init() that enable ps2 drivers for keyboard and mouse. Keyboard interrupt #49 is enabled first and mouse interrupt #51 is enabled later. When initialising the keyboard interrupt (it is a MACEISA interrupt), the interrupt start appearing, so I am pretty sure that interrupt #13 is related to the keyboard interrupt. When the system receive interrupt #13, it correctly detect it is a MACEISA interrupt, and check for mace->perif.ctrl.istat value. The problem seems to be that this value is zero instead of having bit #9 on (that would mean, interrupt #49, keyboard). So, either the interrupt #49 is not correctly enabled, or maceisa interrupt aren't correctly checked. Does this description ring a bell to anyone? Bye, Giuseppe Calling initcall 0xffffffff80496ca0: serport_init+0x0/0x48() initcall 0xffffffff80496ca0: serport_init+0x0/0x48() returned 0. initcall 0xffffffff80496ca0 ran for 0 msecs: serport_init+0x0/0x48() Calling initcall 0xffffffff80496ce8: maceps2_init+0x0/0xe0() initcall 0xffffffff80496ce8: maceps2_init+0x0/0xe0() returned 0. initcall 0xffffffff80496ce8 ran for 1 msecs: maceps2_init+0x0/0xe0() Calling initcall 0xffffffff80496dc8: serio_raw_init+0x0/0x18() initcall 0xffffffff80496dc8: serio_raw_init+0x0/0x18() returned 0. initcall 0xffffffff80496dc8 ran for 1 msecs: serio_raw_init+0x0/0x18() Calling initcall 0xffffffff80496f40: mousedev_init+0x0/0xd0() mice: PS/2 mouse device common for all mice initcall 0xffffffff80496f40: mousedev_init+0x0/0xd0() returned 0. initcall 0xffffffff80496f40 ran for 16 msecs: mousedev_init+0x0/0xd0() Calling initcall 0xffffffff80497010: atkbd_init+0x0/0x18() initcall 0xffffffff80497010: atkbd_init+0x0/0x18() returned 0. initcall 0xffffffff80497010 ran for 0 msecs: atkbd_init+0x0/0x18() Calling initcall 0xffffffff80497028: psmouse_init+0x0/0x90() maceisa enable: 49 crime_int 00000020 enabled *irq 13, crime_int=00002000, crime_mask=003003a0, mace_int=00000000* irq 13, desc: ffffffff80448390, depth: 1, count: 0, unhandled: 0 ->handle_irq(): ffffffff80065eb0, handle_bad_irq+0x0/0x2c0 ->chip(): ffffffff8043e320, 0xffffffff8043e320 ->action(): 0000000000000000 IRQ_DISABLED set
