On Mon, May 27, 2013 at 5:55 AM, Daniel J Blueman <daniel at 1degreenorth.com> wrote:> On 27/05/2013 17:53, Ferenc Wagner wrote: >> >> Daniel J Blueman <daniel at 1degreenorth.com> writes: >> >>> When moving from syslinux 4.06 to 5.01, I found serial output isn't >>> working. The issue reproduces simply [1] and I get back serial output >>> when I move back to syslinux 4.06. >> >> >> Hi Daniel, >> >> What hardware are you working on? In some cases (eg. IBM Bladecenter >> serial over LAN) it became necessary to supply flow control options >> (like SERIAL 1 115200 0x13) to get any output. I never got the >> opportunity to narrow it down to the exact version, but you may want to >> try it until somebody knowledgeable responds. > > > Indeed, I usually use: > serial 1 115200 0x003 > > ...which doesn't work here either. > > Thanks anyway! > > Daniel115200 = 0x1C200 so "SERIAL 1 115200" should be setting the bit rate to 9600 and the flow control to 0x200. -- -Gene
On 05/27/2013 07:49 PM, Gene Cumm wrote:> On Mon, May 27, 2013 at 5:55 AM, Daniel J Blueman > <daniel at 1degreenorth.com> wrote: >> On 27/05/2013 17:53, Ferenc Wagner wrote: >>> >>> Daniel J Blueman <daniel at 1degreenorth.com> writes: >>> >>>> When moving from syslinux 4.06 to 5.01, I found serial output isn't >>>> working. The issue reproduces simply [1] and I get back serial output >>>> when I move back to syslinux 4.06. >>> >>> >>> Hi Daniel, >>> >>> What hardware are you working on? In some cases (eg. IBM Bladecenter >>> serial over LAN) it became necessary to supply flow control options >>> (like SERIAL 1 115200 0x13) to get any output. I never got the >>> opportunity to narrow it down to the exact version, but you may want to >>> try it until somebody knowledgeable responds. >> >> >> Indeed, I usually use: >> serial 1 115200 0x003 >> >> ...which doesn't work here either. >> >> Thanks anyway! >> >> Daniel > > 115200 = 0x1C200 so "SERIAL 1 115200" should be setting the bit rate > to 9600 and the flow control to 0x200.This seems counterintuitive according to the documentation [1]; what should one use to enable the second serial port at 115K? Thanks, Daniel [1] http://www.syslinux.org/wiki/index.php/SYSLINUX -- Daniel J Blueman Principal Software Engineer, 1degreenorth Pte Ltd
On 05/27/2013 04:49 AM, Gene Cumm wrote:> > 115200 = 0x1C200 so "SERIAL 1 115200" should be setting the bit rate > to 9600 and the flow control to 0x200. >I really hope that is not true. -hpa
On Mon, May 27, 2013 at 12:04 PM, H. Peter Anvin <hpa at zytor.com> wrote:> On 05/27/2013 04:49 AM, Gene Cumm wrote: >> >> 115200 = 0x1C200 so "SERIAL 1 115200" should be setting the bit rate >> to 9600 and the flow control to 0x200. >> > > I really hope that is not true.Should "SERIAL port [[baudrate] flowcontrol]" actually be "SERIAL port [baudrate [flowcontrol]]"? -- -Gene