Can't enter recovery mode use Servo board

[Eddy Lu]

Platform: Ramibi, Servo board

I plug the USB stick at Servo board "USB_KEY" socket and press esc+refrech+power to enter recovery mode.

Chromebook device will lock at "Insert screen", but not enter recovery mode.

If I plug USB stick at Chromebook device, it can enter recovery mode properly.

I use the  command "dut-control usb_mux_sel1:dut_sees_usbkey" to make sure the Chromebook device can detect USB stick before.

Any suggestions?

[Gabe Black]

Have you plugged in the USB cable which goes from the servo board to the DUT? The USB isn't transferred over the servo cable.

Gabe

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[Eddy Lu]

Yes, I plug the USB cable from Servo(DUT_HUB_IN) to DUT and  It can be detected in Chromebook device (ls /dev/sd*).

[Richard Barnette]

On 7/29/14, 12:01 AM, Eddy Lu wrote:
> Yes, I plug the USB cable from Servo(DUT_HUB_IN) to DUT and It can be
> detected in Chromebook device (ls /dev/sd*).
>

A question, and two suggestions:
* What model device is this?
* To plug in the USB stick, you may need this command:
dut-control usb_mux_sel1:dut_sees_usbkey prtctl4_pwren:on
* Instead of esc+refresh+power, try the command below, and
report what happens:
dut-control power_state:rec usb_mux_sel1:dut_sees_usbkey
prtctl4_pwren:on

Thanks!

>
> On Tuesday, July 29, 2014 2:23:18 PM UTC+8, Eddy Lu wrote:
>
> Platform: Ramibi, Servo board
>
> I plug the USB stick at Servo board "USB_KEY" socket and press
> esc+refrech+power to enter recovery mode.
>
> Chromebook device will lock at "Insert screen", but not enter
> recovery mode.
>
> If I plug USB stick at Chromebook device, it can enter recovery mode
> properly.
>
> I use the command "dut-control usb_mux_sel1:dut_sees_usbkey" to
> make sure the Chromebook device can detect USB stick before.
>
> Any suggestions?
>

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--jrb

[Shawn N]

Can you check the RO FW version on your system? Run "crossystem ro_fwid" to check it. You may be missing this change:

https://chromium-review.googlesource.com/#/c/202297/

Prior to landing the above change, we saw issues with booting / detection of certain USB mass storage devices in recovery mode, depending on USB device setup.

Any FW version < R34-5216.214.0 does not have the fix.

On Mon, Jul 28, 2014 at 11:23 PM, Eddy Lu <puzz...@gmail.com> wrote:

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[Eddy Lu]

Thanks for all your help, I change another usb stick and it works.

Model: Rambi

FW version:  R34-5216.242