Hello, I just compiled 2.4.21 and got unresolved symbols in scx200_i2c.o: if [ -r System.map ]; then /sbin/depmod -ae -F System.map 2.4.21-tc1; fi depmod: *** Unresolved symbols in /lib/modules/2.4.21-tc1/kernel/drivers/i2c/scx200_i2c.o depmod: scx200_gpio_base_Rsmp_254e5667 depmod: scx200_gpio_configure_Rsmp_80c65a79 depmod: scx200_gpio_shadow_Rsmp_9272bc53 Its almost a vanilla kernel, only Win4Lin patches from Netraverse were applied. The kernel-configuration is attached. Best regards, Bernd -- Bernd Schubert Physikalisch Chemisches Institut Abt. Theoretische Chemie Universität Heidelberg INF 229 69120 Heidelberg e-mail: bernd.schubert (at) pci.uni-heidelberg.de