When I try to start KDE 2.0 with SMP builds of 2.4.0-test11-ac2 and ac4, the system locks up after "Loading Panel". Nothing odd gets logged to /var/log/messages. I can successfully run KDE 2.0 with UP builds of any of these kernels. I can successfully run Gnome or Fvwm1 with either UP or SMP builds of any of these kernels. This table summarizes my experience with KDE 2.0 with recent 2.4.0-test11 and later kernels: UP SMP test11 OK OK test11-ac1 OK OK test11-ac2 OK FAILS test11-ac3 NOT TESTED test11-ac4 OK FAILS The 2.4.0-test11-ac1 SMP kernel which successfully runs KDE 2.0 has my small patch to linux/include/asm-i386/hardirq.h which allowed an SMP kernel to be built for test11-ac1. The base distribution of this system is Linux-Mandrake 7.2. The hardware is a Dell Precision 420 Dual P-III. All kernels are patched with linux-2.4.0-test10-reiserfs-3.6.19-patch. Steven - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/