From mboxrd@z Thu Jan 1 00:00:00 1970 From: Igor Mazanov Subject: USB only powered Beaglebone powers off when ethernet cable is connected Date: Fri, 16 Nov 2012 18:34:43 +0400 Message-ID: Reply-To: i.mazanov@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset=KOI8-R; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from plane.gmane.org ([80.91.229.3]:35826 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751243Ab2KPOeW (ORCPT ); Fri, 16 Nov 2012 09:34:22 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1TZN00-0006L2-SZ for linux-omap@vger.kernel.org; Fri, 16 Nov 2012 15:34:28 +0100 Received: from 77.232.56.122 ([77.232.56.122]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 16 Nov 2012 15:34:28 +0100 Received: from i.mazanov by 77.232.56.122 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 16 Nov 2012 15:34:28 +0100 Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: linux-omap@vger.kernel.org Hello, Interesting, but Beaglebone powers off on the boot in case when the board is powered only via USB and ethernet cable is connected. It looks like PMIC turns off all voltages on the board - even Power LED doesn't light and USB device disappears from the host. The described situation doesn't show with an external PSU or without ethernet cable. I don't think that is a hardware problem because the board boots fine with a kernel/userland config from original supplied TF card. I use the current git kernel with DTS and omap2plus_defconfig. Regards, Igor.