Hi Manuel, thank you for your quick response. Am Samstag, den 24.01.2009, 08:57 +0100 schrieb Manuel Lauss: > > I just want to ask who is working with the au1550 on a more recent > > kernel than 2.6.16.11. > > I'll start now with some early printk to solve booting problems and than > > we will see ..... > > I know of at least one person running 2.6.26 or .27 on a Au1550. > You should start by throwing away the defconfig ;-). Create a new > config with only au1x00 serial and serial console enabled and then add > new devices one at a time and see where it breaks. Yestoday I tested the earlyprintk stuff witout luck :-( I simply added this CMDLINE earlycon=uart,mmio,0x11100000,115200n8 console=ttyS0,115200n8 panic=1 The drivers/serial/8250_early.o is build in the kernel but without adding CONFIG_EARLY_PRINTK or CONFIG_SYS_HAS_EARLY_PRINTK. Maybe this is the problem. On the running kernel I see this. Serial: 8250/16550 driver $Revision: 1.90 $ 5 ports, IRQ sharing enabled serial8250.7: ttyS0 at MMIO 0x11100000 (irq = 0) is a 16550A serial8250.7: ttyS1 at MMIO 0x11200000 (irq = 8) is a 16550A serial8250.7: ttyS2 at MMIO 0x11400000 (irq = 9) is a 16550A The console is console=ttyS0,115200n8 .... Now I'll go more deep into the kernel. > > (Btw, which board? I'd love to get my hands on other alchemy boards to > test on). It is a customer board not available on the market. It is possible for you to connect me to this person. Maybe we can share some know how. At the moment I work on USB Analog/DVB stuff more deep on MIPS. Kind Regards, Frank