On 18/11/16 07:52, Leo Yan wrote:

On Fri, Nov 18, 2016 at 11:14:53AM +0530, Amit Kucheria wrote:

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Hi Leo,

Have you tried the baud rate of 921600?

Thanks, Amit. Yeah, 921600 can work well, this UART port is used by firmware but no kernel console.

I have a console on LS-UART0 (at 921600 baud). It doesn't become quiet enough to use until the boot is completed (and even then is very painful).

Try: echo 0 > /proc/sys/kernel/printk

Daniel.

Thanks, Leo Yan

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2016-11-18 9:31 GMT+05:30 Leo Yan leo.yan@linaro.org:

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Hi all,

I'm working one MediaTek X20 96boards, and install one Mezzanine board on it so can try to see if UART can work well or not.

After tried to switch Mezzanine's Jumpers in J1 to UART0, so I can see it can print out some logs; but later images print out log but totally cannot be unrecognized, please see below log info.

Tried to change baudrate from 115200 to 38400, but it's no lucky. So the unrecognized char issue is not caused by baudrate. Before I look into detailed kernel configuration, I'd like check if any guy has fixed this issue, could you point out what's wrong for this?

Thanks in advance. Leo Yan

---8<---

F0: 102B 0000 F3: 0000 0000 V0: 0000 0000 [0001] 00: 0000 0000 BP: 0000 0041 [0000] G0: 0190 0000 EC: 0000 0000 [0001] T0: 0000 0163 [000F] Jump to BL

READY *3 Sw ? 2" 0

Rr?9 ?

?r

smNBrpt*s B: t *?_ @ ?? M 2 Er )#"?JBb* rJ :0 ? &?

r ? ( & b*? ? ?J/1r:] *' ) "B: ? p Z 6 J

R8r*B? K* #

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