ehci-hcd module is not loaded automatically on pandaboard

Bug #1076289 reported by Fathi Boudra on 2012-11-08
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Linaro Ubuntu
High
Fathi Boudra
linaro-landing-team-ti
New
Undecided
Unassigned

Bug Description

ehci-hcd module is not loaded automatically on pandaboard.
hwpack: hwpack_linaro-lt-panda (3.4.11-2604-ga393db0-omap4plus-linaro-lt-omap)
rootfs: nano

Fathi Boudra (fboudra) on 2012-11-08
Changed in linaro-ubuntu:
milestone: none → 12.11
status: New → Triaged
warmcat (andy-warmcat) wrote :

In the last weeks we changed our config to build these two modules modular instead of in-kernel.

The reason is that after patches to make the defaults more sane, with the modules out or removed, the OMAP4 Pandas takes less than half the idle power it otherwise would.

The choices are AFAIK:

 - force them to build in-kernel in the config
 - force-insert the modules during init
 - add a udev rule to insert them

Fathi Boudra (fboudra) wrote :

I'm adding an udev rules as suggested by Andy Green:
$ cat /lib/udev/rules.d/40-ti-omap-ehci.rules
ACTION=="add", SUBSYSTEM=="platform", KERNEL=="usbhs_omap", RUN+="/sbin/modprobe -bv ehci-hcd"

Changed in linaro-ubuntu:
assignee: nobody → Fathi Boudra (fboudra)
status: Triaged → In Progress
Fathi Boudra (fboudra) on 2012-11-08
Changed in linaro-ubuntu:
importance: Undecided → High
status: In Progress → Fix Committed
Fathi Boudra (fboudra) wrote :
Changed in linaro-ubuntu:
status: Fix Committed → Fix Released
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