From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 1826C138330 for ; Fri, 23 Sep 2016 08:13:12 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 296F1E00B3; Fri, 23 Sep 2016 08:13:04 +0000 (UTC) Received: from smarthost01a.mail.zen.net.uk (smarthost01a.mail.zen.net.uk [212.23.1.1]) by pigeon.gentoo.org (Postfix) with ESMTP id 1CE5DE0881 for ; Fri, 23 Sep 2016 08:13:01 +0000 (UTC) Received: from [82.69.80.10] (helo=peak.localnet) by smarthost01a.mail.zen.net.uk with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.80) (envelope-from ) id 1bnLbQ-0000VH-Iu for gentoo-user@lists.gentoo.org; Fri, 23 Sep 2016 08:13:00 +0000 From: Peter Humphrey To: gentoo-user@lists.gentoo.org Subject: [gentoo-user] Madly flickering display Date: Fri, 23 Sep 2016 09:13 +0100 Message-ID: <2926816.LQt0eU1VXK@peak> User-Agent: KMail/4.14.10 (Linux/4.7.4-gentoo; KDE/4.14.24; x86_64; ; ) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Originating-smarthost01a-IP: [82.69.80.10] Feedback-ID: 82.69.80.10 X-Archives-Salt: 92e4b8d5-3512-42e8-b2bc-72080d23f5a1 X-Archives-Hash: 305a3117d6a36c4935d8ec64a16e96e0 I've broken this out from the thread it appeared in, Problems with Xinerama after upgrade to Plasma (KDE5): On Friday 16 Sep 2016 11:18:18 I wrote: --->8 > I upgraded yesterday from 5.7.4 to 5.7.5. I hoped the problem I have had > been fixed, but no. If I switch desktops too many times, or too often or > something, the desktop becomes unusable until I reboot (I haven't tried > just restarting xdm). It flickers rapidly, bits of one desktop are shown > in the middle of another or on a blank background, and it's hard to see > just which is the currently active desktop. > > This may be a bad interaction with the xorg-driver for my AMD GPU, which > has only been on the market for about a year. Though > sys-firmware/amdgpu-ucode hasn't changed since June. I found from Xorg.0.log that X11 wasn't finding an evdev module, even though I had INPUT_DEVICES="evdev" in make.conf. So I added USE=evdev to dev- qt/qtgui* and that created the module, even though kensington@gentoo said it had nothing to do with it. I still get the rapid flickering and general confusion though, which is cured by logging out and in again. * That was the only relevant package to have such a USE flag, according to "equery h -p evdev". -- Rgds Peter