From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F4BEEB64D9 for ; Fri, 7 Jul 2023 01:28:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230170AbjGGB2k (ORCPT ); Thu, 6 Jul 2023 21:28:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40928 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229536AbjGGB2k (ORCPT ); Thu, 6 Jul 2023 21:28:40 -0400 X-Greylist: delayed 2568 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Thu, 06 Jul 2023 18:28:38 PDT Received: from mx.treblig.org (unknown [IPv6:2a00:1098:5b::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D93A41BF0; Thu, 6 Jul 2023 18:28:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=treblig.org ; s=bytemarkmx; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID :Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID :Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To: Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe :List-Post:List-Owner:List-Archive; bh=SPXW4HA5NH/c+C0DrIDwZN76DiNAzrkqtCJX7xB7o0c=; b=FE2mUBY9tZNpyNzEU6mzQT4d4I orZGI6uL2KCK5DaDLSH5nPIdn+WGtjgRroxC2rjaj2eIhN3IGkkAS6Fo59qVXTVIqR1PIsjy/b2I9 9VS+zNG4HeK6Mlhea51J3JMaDqJ1oiHNSpDqcJjxnlv1GkgHdrfvwMWZYy0XQHsNXsP5s+7sjgBsh H4zjQ7IZqJpJbnIqv8e6ktnh/NUFGUMNOSTN2VYYdhxpa5UHAsYJFDZ9zpTLY7uH/MvC+5ml+91D6 ral+dlTWfUhqT8XRz7f1xVP7Te8uqGjVVwaXbpsZZl6uJwSF1NK+SZfYMicXkZzv7gwX8IIl9nC86 y4K9mh4Q==; Received: from dg by mx.treblig.org with local (Exim 4.94.2) (envelope-from ) id 1qHZbO-0004eg-63; Fri, 07 Jul 2023 00:45:38 +0000 Date: Fri, 7 Jul 2023 00:45:38 +0000 From: "Dr. David Alan Gilbert" To: Bagas Sanjaya Cc: Greg Kroah-Hartman , Johan Hovold , primalmotion , Linux Kernel Mailing List , Linux USB Subject: Re: Fwd: unable to boot when monitor is attached Message-ID: References: <5eb57bfe-94a4-136b-497e-deeb31846db1@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <5eb57bfe-94a4-136b-497e-deeb31846db1@gmail.com> X-Chocolate: 70 percent or better cocoa solids preferably X-Operating-System: Linux/5.10.0-23-amd64 (x86_64) X-Uptime: 00:41:58 up 10:13, 1 user, load average: 0.00, 0.00, 0.00 User-Agent: Mutt/2.0.5 (2021-01-21) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org * Bagas Sanjaya (bagasdotme@gmail.com) wrote: > Hi, > > I notice a regression report on Bugzilla [1]. Quoting from it: > > > > > In the latest 6.3 and 6.4, it is impossible for me to boot my laptop if my DELL U2720Q monitor is plugged in (USB-C). I have to unplug it, then boot. As soon as the first second of boot went through, I can plug in my monitor and there is no issue afterward. There is no issue waking up after suspend. Only when it boots. > > > > See the attached pictures of the trace. The trace itself seems random (at least to me :)). I tried several things, like removing any attached USB devices from the monitor built-in USB-hub, but that does not change anything. (there is a keyboard and trackpad attached). > > See Bugzilla for the full thread. > > Unfortunately, the reporter can only provide photos of kernel trace > (as he doesn't have any other means to extract kernel logs, maybe > connecting over serial helps; see Bugzilla for these attachments). I note the photos have 'crud' at the bottom; as if something interesting is in the video ram; perhaps something is freaked out by this nice 4k monitor and some useful data structures are ending up in video ram. (Also note it's a librem with pureboot) Dave > > Anyway, I'm adding it to regzbot so that it doesn't fall through > cracks unnoticed: > > #regzbot introduced: v6.1..v6.3 https://bugzilla.kernel.org/show_bug.cgi?id=217637 > #regzbot title: unable to boot with Dell U2720Q monitor attached > > Thanks. > > [1]: https://bugzilla.kernel.org/show_bug.cgi?id=217637 > > -- > An old man doll... just what I always wanted! - Clara -- -----Open up your eyes, open up your mind, open up your code ------- / Dr. David Alan Gilbert | Running GNU/Linux | Happy \ \ dave @ treblig.org | | In Hex / \ _________________________|_____ http://www.treblig.org |_______/