motor attributes missing at kernel 3.16.1-3-ev3dev

[BertLindeman]

Cannot find the fields to control motor(s) on this kernel. Removed and re-plugged ev3 motor into port B and port D. dmesg shows:

ev3-output-port outD: Removed device 'outD:motor'
ev3-output-port outD: Added new device 'outD:motor'
ev3-output-port outB: Removed device 'outB:motor'
ev3-output-port outB: Added new device 'outB:motor'

So motor is recognized.

Looking with ls -l /sys/class/tacho-motor shows nothing.

Tried to find the fields like this: find /sys/ -name "duty_cycle*" and find /sys/ -name pulses_per_second_sp

Nothing . . .

No motor port has been disabled this time. Rebooted with output port 1 disabled to see if that makes a difference. Sep 28 21:32:43 ev3dev kernel: legoev3-ports legoev3-ports: Output port outA is disabled.

No difference...

These files are present:

 find /sys -name "*motor*"
/sys/bus/legoev3/devices/outD:motor
/sys/bus/legoev3/devices/outB:motor
/sys/bus/legoev3/devices/outC:motor
/sys/bus/legoev3/drivers/ev3-tacho-motor
/sys/devices/platform/legoev3-ports/outB/outB:motor
/sys/devices/platform/legoev3-ports/outC/outC:motor
/sys/devices/platform/legoev3-ports/outD/outD:motor
/sys/class/tacho-motor
/sys/module/ev3_tacho_motor
/sys/module/ev3_tacho_motor/drivers/legoev3:ev3-tacho-motor
/sys/module/tacho_motor_class
/sys/module/tacho_motor_class/holders/ev3_tacho_motor
/sys/module/legoev3_ports/holders/ev3_tacho_motor

[dlech]

Hmm... wonder if I broke the driver name matching with the changes I made for sensors. I'll look in to it.

[dlech]

Fix is released. Also apt-get dist-upgrade worked for me this time.

[BertLindeman]

For me too. Just do not understand the difference in processing of the two firmware pacakges. It maybe related to the install problems I had some weeks ago, I do not know. rtl8192cu-modules gets removed and a new version installed. rtl8188eu-modules just installs a new version.

Part of the apt-get dist-upgrade output:

The following packages will be REMOVED:
   rtl8192cu-modules-3.16.1-3-ev3dev (4.0.2-9000.20131029-0ev3dev1+4)
The following NEW packages will be installed:
   linux-image-3.16.1-4-ev3dev (1)
   rtl8188eu-modules-3.16.1-4-ev3dev (3+1)
   rtl8192cu-modules-3.16.1-4-ev3dev (4.0.2-9000.20131029-0ev3dev1+1)

Not important I assume.

Status @frbernat

• installed (apt-get update && apt-get dist-upgrade)
• rebooted
• motor attributes back again ;-)

Thanks @dlech

[dlech]

the difference in processing of the two firmware packages.

One package contains some files in /etc/. When upgrading the package names are actually different, not just the version, so apt sees this as a completely different package trying to write over the file of a different package. The other doesn't have extra files, so the new package can live side-by-side with the old one. I should probably change this so that if you roll back to an older kernel version, your wireless doesn't break.

[BertLindeman]

Ah, Thanks for the explanation. Would be nice to be able to roll back. Maybe. Personally I would go back to a previously saved backup image. Which reminds me: hi time for me to do the backup.