Bug#762396: systemd: serial devices /dev/ttyS2 and /dev/ttyS3 do not work

[Michael Biebl]

Control: reassign -1 modemmanager

Am 22.09.2014 um 10:58 schrieb M G Berberich:
> Hello,
> 
> Am Sonntag, den 21. September schrieb Michael Biebl:
>> Am 21.09.2014 um 22:23 schrieb M G Berberich:
>>> Package: systemd
>>> Version: 208-8
>>> Severity: normal
>>>
>>> Dear Maintainer,
>>>
>>> I have a card with two additional serial devices in the system, giving
>>> /dev/ttyS2 and /dev/ttyS3. One with a thermal sensor and one with a
>>> serial terminal. These serial devices do not work when the system is
>>> started with systemd. They do work fine if sysvinit is used.
>>
>> Looking at the systemd-analyze dump, I see
>>
> …
>>
>> The devices seem to be functional, but maybe the getty on ttyS2
>> interferes with what you want to do with ttyS2?
> 
> No, on ttyS2 there is a serial Terminal (VT320), so this is O.K.
> 
> But I found the problem:
> It was modemmanager, which was _automatically_ installed. Modemmanager
> screwed up ttyS3 and ttyS2 (perhaps the onboard ttyS0 and ttyS1 also,
> but I can’t tell, because there is no device on ttyS0 and ttyS1 does
> not even have a connector). Probably systemd/modemmanager/dbus assumes
> that there must be a modem understanding AT-commands behind every
> serial interface. Uninstalling modemmanager does the job.

Ok, re-assigning to modemmanager.
Which version of modemmanager did you have installed?


-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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