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DateFri, 8 Dec 2006 00:52:26 -0800
From"Yinghai Lu" <>
SubjectRe: [LinuxBIOS] [linux-usb-devel] [RFC][PATCH 0/2] x86_64 Early usb debug port support.
On 12/7/06, Greg KH <gregkh@suse.de> wrote:
> Ugh, no, never use the usb-serial driver as a console device.
>> That was a bad hack done as a bet many years ago.  For many obvious
> reasons it does not work well.
understood, I found with usb_serial convertor could lose some chatacter.
but the usb-debug cable seem it keep all character.
>> > host with cat /dev/ttyUSB0> > But if use minicom in host, it will not show '\r', I guess the usb debug
> > cable eat return char. Greg, Can you add that back in usb_debug by
> > replacing '\n' with '\r', '\n'?>> The usb-serial console code should handle this, I thought we fixed it a
> while ago.
Is it in the git tree?
>> But this kind of interface is not what these devices are good for.  They
> are for the debug port information, not as a usb-serial console device.
> Otherwise they are way too expensive of a device...
the problem is some "modern" PC will left out serial port. then the cable
could get cheap.

YH
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