[Nexus 7 Q&A, Help & Troubleshooting] waylandsmith:
Current limited to 250mA in host mode

So, I've installed this kernel (V2), the power manager app, rooted (I discovered the power manager app didn't work without root) and have constructed a Y cable (currently powered by my bench power supply) and no matter what settings I choose, my power supply indicates that it's drawing about 250mA only.

The OTG Y cable was constructed from an existing OTG cable, basically as described here: http://xdaforums.com/showthread.php?t=1828032

I've selected Fixed Installation mode and Fast Charging in Host Mode in the power manager app.

Any advice? The project I'm working on is a fixed installation and cannot operate on a 250mA cable since that will obviously not power the device for very long.

Any advice would be appreciated!

EDIT:

This is the kernel messages that I get when plugging in the Y cable. It APPEARS to be setting the charging limit to 1800mA.

<6>[ 9486.852896] -tegra_otg_irq(): ID=2 VBUS=0

<6>[ 9486.853203] -tegra_otg_irq(): ID=2 VBUS=0 DONE

<6>[ 9486.853408] tegra-otg tegra-otg: USB_ID_INT_STATUS

<6>[ 9486.853560] tegra-otg tegra-otg: set id_is_set, to = OTG_STATE_A_HOST (OTG PLUGGED)

<6>[ 9486.853832] tegra-otg tegra-otg: SUSPEND --> HOST

<6>[ 9486.853979] tegra-otg tegra-otg: call smb347_otg_status()

<4>[ 9486.854252] smb347_otg_status from=10 to=9 hostmode=0 externalPowerState=0 usbhost_charge_slave_devices=0 fixed_install_mode=1

<6>[ 9486.854521] cable_type_detect()

<6>[ 9486.854665] INOK=H no power

<4>[ 9486.854809] ========================================================

<4>[ 9486.855071] battery_callback usb_cable_state = 0

<4>[ 9486.855215] ========================================================

<6>[ 9486.856608] elan-ktf3k 1-0010: Update power source to 0

<4>[ 9486.857807] smb347_otg_status allow battery to be charged

<4>[ 9486.859248] smb347_configure_charger accept external power

<4>[ 9486.860160] smb347_otg_status disableOTG, dont chargeSlaves, don't stopChargeSlaves

<4>[ 9486.860441] smb347_configure_otg otg=0 chargeSlaves=0 stopSlaves=0 lastOtg=0

<4>[ 9486.862044] smb347_otg_status make external power detectable2

<4>[ 9486.863707] smb347_otg_status DONE hostmode=0 externalPowerState=0 chargeSlaveDevicesState=0

<6>[ 9486.863989] tegra-otg tegra-otg: call tegra_start_host()

<6>[ 9486.865193] phy->instance = 0, phy->xcvr_setup_value = 57

<3>[ 9486.866175] couldn't get regulator avdd_usb: -19

<4>[ 9486.866363] tegra_gpio_enable : Invalid gpio ID - 260

<7>[ 9486.866780] gpio_request: gpio-260 (PMU_ACOK) status -16

<3>[ 9486.866929] Failed to request the GPIO260: -16

<6>[ 9486.867802] tegra_usb_phy_open instance 0 TI AC_PRESENT_GPIO = 260

<6>[ 9486.871897] tegra-ehci tegra-ehci.0: Tegra EHCI Host Controller

<6>[ 9486.872255] tegra-ehci tegra-ehci.0: new USB bus registered, assigned bus number 2

<6>[ 9486.895555] tegra-ehci tegra-ehci.0: irq 52, io mem 0x7d000000

<6>[ 9486.915452] tegra-ehci tegra-ehci.0: USB 2.0 started, EHCI 1.00

<6>[ 9486.915742] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002

<6>[ 9486.916052] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1

<6>[ 9486.916321] usb usb2: Product: Tegra EHCI Host Controller

<6>[ 9486.916467] usb usb2: Manufacturer: Linux 3.1.10-kangaroo ehci_hcd

<6>[ 9486.916730] usb usb2: SerialNumber: tegra-ehci.0

<6>[ 9486.918751] hub 2-0:1.0: USB hub found

<6>[ 9486.918935] hub 2-0:1.0: 1 port detected

<6>[ 9486.919847] Wake39 for irq=52

<6>[ 9486.919999] Enabling wake39

<6>[ 9486.920163] tegra-otg tegra-otg: done id_is_set=1 ##############

<6>[ 9487.750868] -tegra_otg_irq(): ID=0 VBUS=512

<6>[ 9487.751049] -tegra_otg_irq(): ID=0 VBUS=512 DONE

<6>[ 9487.751391] tegra-otg tegra-otg: !USB_ID_INT_STATUS but USB_VBUS_INT_STATUS id_is_set)1

<6>[ 9487.751544] tegra-otg tegra-otg: USB_VBUS_INT_STATUS

<6>[ 9487.751809] tegra-otg tegra-otg: USB_VBUS_STATUS && id_is_set: to=OTG_STATE_A_HOST

<6>[ 9487.751961] tegra-otg tegra-otg: HOST --> HOST

<6>[ 9487.752224] tegra-otg tegra-otg: call smb347_otg_status()

<4>[ 9487.752377] smb347_otg_status from=9 to=9 hostmode=0 externalPowerState=0 usbhost_charge_slave_devices=0 fixed_install_mode=1

<6>[ 9487.752649] cable_type_detect()

<6>[ 9487.752914] INOK=L

<5>[ 9487.753292] smb347_charger: [cable_type_detect] Reg39 : 0x10

<5>[ 9487.753673] smb347_charger: [cable_type_detect] Reg3F : 0x80

<5>[ 9487.753941] smb347_charger: [cable_type_detect] USB_IN

<5>[ 9487.754319] smb347_charger: [cable_type_detect] Reg3E : 0x0e

<6>[ 9487.754591] Cable: host mode charging ac

<4>[ 9487.754736] ========================================================

<4>[ 9487.755000] battery_callback usb_cable_state = 3

<4>[ 9487.755145] ========================================================

<4>[ 9487.755981] battery_callback cable_wake_lock 5 sec...

<4>[ 9487.755990]

<6>[ 9487.756295] elan-ktf3k 1-0010: Update power source to 1

<4>[ 9487.757439] smb347_otg_status allow battery to be charged

<4>[ 9487.759320] smb347_otg_status enableOTG, dont chargeSlaves, don't stopChargeSlaves

<4>[ 9487.759602] smb347_configure_otg otg=1 chargeSlaves=0 stopSlaves=0 lastOtg=0

<4>[ 9487.760120] smb347_configure_otg enable host mode

<4>[ 9487.762289] smb347_otg_status make external power detectable2

<4>[ 9487.766524] smb347_otg_status DONE hostmode=1 externalPowerState=1 chargeSlaveDevicesState=0

<6>[ 9487.766807] tegra-otg tegra-otg: call tegra_start_host()

<6>[ 9487.766955] tegra-otg tegra-otg: done id_is_set=1 ##############

<6>[ 9487.768260] healthd: battery l=24 v=3721 t=30.0 h=2 st=2 chg=a

<6>[ 9488.171069] call alarm, type 2, func alarm_triggered+0x0/0xa0, 68998832000000 (s 68998832000000) firm_sleep=1 suspended=0

<4>[ 9488.335465] inok_isr_work_function hostmode=1 externalPowerState=1 usbhost_charge_slave_devices=0

<6>[ 9488.335635] cable_type_detect()

<6>[ 9488.335901] INOK=L

<5>[ 9488.336345] smb347_charger: [cable_type_detect] Reg39 : 0x10

<5>[ 9488.336725] smb347_charger: [cable_type_detect] Reg3F : 0x81

<5>[ 9488.336995] smb347_charger: [cable_type_detect] USB_IN

<5>[ 9488.337369] smb347_charger: [cable_type_detect] Reg3E : 0x0e

<6>[ 9488.337636] Cable: host mode charging ac

<4>[ 9488.337778] ========================================================

<4>[ 9488.338039] battery_callback usb_cable_state = 3

<4>[ 9488.338181] ========================================================

<6>[ 9488.338972] elan-ktf3k 1-0010: Update power source to 1

<4>[ 9488.339331] inok_isr_work_function external power available hostmode=1

<6>[ 9488.344445] healthd: battery l=24 v=3720 t=30.0 h=2 st=2 chg=a

<6>[ 9488.590963] call alarm, type 2, func alarm_triggered+0x0/0xa0, 310670000000 (s 310670000000) firm_sleep=1 suspended=0