S3 suspend and serial console

[Carl-Daniel Hailfinger <c-d.hailfinger.devel.2005-hi6Y0CQ0nG0@public.gmane.org>]

Hi,

on resume from S3, my serial console prints garbage and stops working.
I assume the BIOS resets the serial port on resume, but I have
abolutely no idea how to find out what speed and parity the serial
port has after resume. A quick try of 9600,57600,115200 didn't
succeed and I now wonder if
- the kernel could reset the serial ports on resume
- the kernel could read the current parameters from the UART and print
them out so I can adjust my serial console.

Oh well... after some investigation, it seems the serial console
goes back to normal after issuing the command
echo foo >/dev/ttyS0

Could it be that the UART state is out-of-sync or something like that
after resume and the serial console code doesn't notice?

Regards,
Carl-Daniel
-- 
http://www.hailfinger.org/



-------------------------------------------------------
This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting
Tool for open source databases. Create drag-&-drop reports. Save time
by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc.
Download a FREE copy at http://www.intelliview.com/go/osdn_nl