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cwalls · 01-15-2022, 01:48 AM

Hello,

I am connected to the serial pins at the back of my Kindle Voyage (5.13.5).
The connection seems to work fine, when I press a key at the right time, I get dropped to the 'uboot >' prompt.

However all further input gets ignored. If I press enter the cursor just goes to the beginning of the current line, no matter what I typed.

I also noticed that if I connect to power (via usb) lots of gibberish appears on the serial terminal.

Another Issue which might be related is that if I try to boot normally, I get stuck with:

Code:

imx_epdc_fb imx_epdc_fb: unable to set VCOM = 250mV (err = -22)
..
BATTERY INVALID: -22
..
=== BATTERY ID IS INVALID. STOPPING BOOT ===

I am grateful for any Infos/Ideas!

01-15-2022, 01:48 AM	#1
cwalls Member Posts: 10 Karma: 1010 Join Date: Jan 2022 Device: Kindle Voyage 3G + WiFi (Europe)	uboot ignores input Hello, I am connected to the serial pins at the back of my Kindle Voyage (5.13.5). The connection seems to work fine, when I press a key at the right time, I get dropped to the 'uboot >' prompt. However all further input gets ignored. If I press enter the cursor just goes to the beginning of the current line, no matter what I typed. I also noticed that if I connect to power (via usb) lots of gibberish appears on the serial terminal. Another Issue which might be related is that if I try to boot normally, I get stuck with: Code: imx_epdc_fb imx_epdc_fb: unable to set VCOM = 250mV (err = -22) .. BATTERY INVALID: -22 .. === BATTERY ID IS INVALID. STOPPING BOOT === I am grateful for any Infos/Ideas!