From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Giassa Subject: Question: Assessing cause of PM issue on Ubuntu Date: Sun, 28 May 2017 09:25:23 -0700 Message-ID: <20170528162523.rmpggi76iwigv3bv@darkstar> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Return-path: Received: from mail-qk0-f181.google.com ([209.85.220.181]:36069 "EHLO mail-qk0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750791AbdE1QZ1 (ORCPT ); Sun, 28 May 2017 12:25:27 -0400 Received: by mail-qk0-f181.google.com with SMTP id u75so34791803qka.3 for ; Sun, 28 May 2017 09:25:27 -0700 (PDT) Content-Disposition: inline Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: linux-pm@vger.kernel.org Good day, I'm testing out kernel 4.12.0-rc2 (56fff1bb0f31358bf81a3c64a8dcd6da0dc44263) on an Ubuntu 16.04.2 LTS machine (fresh install), with suspend and hibernation disabled. With this kernel, if I allow the monitor to go into standby mode, I am not able to "wake up" the monitor. Mouse and keyboard activity triggers the LED to change from "standby/orange" to "ready/green" for a few seconds, but then re-enters standby mode. The only way to regain use of the machine locally is to drop to a virtual console via CTRL+ALT+F1, login, "startx". Is there a preferred VM/testbench to assess if this is an Ubuntu issue as opposed to a Linux PM issue before filing a bug report. Also, is there a standard set of logs/dumps that would be helpful for debugging? I've checked existing docs on basic PM debugging [1], but couldn't find anything related to this use case. Cheers! 1. "Debugging hibernation and suspend", , Last accessed 2017-05-28. -- -Matthew