lkml.org 
[lkml]   [2013]   [Apr]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: No serial since kernel 3.8
On Tue, 16 Apr 2013 10:59:53 -0400
Josh Boyer <jwboyer@gmail.com> wrote:

> On Tue, Apr 16, 2013 at 04:55:25PM +0200, richard -rw- weinberger wrote:
> >On Tue, Apr 16, 2013 at 4:20 PM, Stephan von Krawczynski
> ><skraw@ithnet.com> wrote:
> >> Hello,
> >>
> >> can some kind soul please explain how I can get my serial port back under
> >> kernel 3.8.X. Earlier kernels showed:
> >>
> >> Jan 10 13:57:18 mybox kernel: [ 0.712829] serial8250: ttyS0 at I/O 0x3f8
> >> (irq = 4) is a 16550A
> >>
> >> But 3.8.4:
> >>
> >> Mar 26 10:39:14 admin kernel: [ 0.603647] serial 00:0a: disabled
> >>
> >> Only kernel is replaced, no change in distro
> >> Is there some kernel boot parameter needed now?
> >> I tried 3.4.X and it works, even 3.7.X works...
> >
> >So, 3.8.3 worked and 3.8.4 introduced a regression?
> >If so please confirm.
> >
> >CC'ing gregkh, just in case...
>
> We had a report of this in Fedora that was fixed with 3.8.7. An upstream
> change had been brought back to the 3.8.x series, and it was subsequently
> reverted. 3.8.7 picked up the revert.
>
> josh

3.8.7 does not work either. I just checked it. I tried shared and not shared IRQ:

Apr 16 17:47:05 mybox kernel: [ 0.604826] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled

and another test:

Apr 16 18:07:08 mybox kernel: [ 0.601203] Serial: 8250/16550 driver, 8 ports, IRQ sharing enabled

I must say that 3.8.7 does not even tell the "serial 00:0a: disabled" any more.
This is no special board, it is a pretty mainstream asus xeon board with onboard serial.
Loading 3.4.24 (just an example) makes the port work immediately.
Anything else I can test?

--
Regards,
Stephan



\
 
 \ /
  Last update: 2013-04-16 19:01    [W:0.080 / U:0.132 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site