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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16B71C43460 for ; Sun, 2 May 2021 18:42:51 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A8E2E61353 for ; Sun, 2 May 2021 18:42:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A8E2E61353 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:33264 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ldH3J-0000Zm-FV for qemu-devel@archiver.kernel.org; Sun, 02 May 2021 14:42:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55214) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ldGrt-0004ZX-Gr for qemu-devel@nongnu.org; Sun, 02 May 2021 14:31:05 -0400 Received: from indium.canonical.com ([91.189.90.7]:46336) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ldGri-0002qk-1v for qemu-devel@nongnu.org; Sun, 02 May 2021 14:31:01 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1ldGrg-0001El-S6 for ; Sun, 02 May 2021 18:30:48 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id D3C262E815B for ; Sun, 2 May 2021 18:30:48 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Sun, 02 May 2021 18:21:10 -0000 From: Thomas Huth <1858623@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Incomplete; importance=Undecided; assignee=None; X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: th-huth theartlav X-Launchpad-Bug-Reporter: Artyom (theartlav) X-Launchpad-Bug-Modifier: Thomas Huth (th-huth) References: <157839132261.5317.2350112240462311551.malonedeb@gac.canonical.com> Message-Id: <161997967119.12465.3718854885867426269.malone@soybean.canonical.com> Subject: [Bug 1858623] Re: VNC outputs garbage in zlib mode X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="02afa4875ac52c169f5cddf0d1bcdd6e149a3754"; Instance="production" X-Launchpad-Hash: c02405d867ddcbdfbc807861fd9ee786069907fe Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-Spam_score_int: -66 X-Spam_score: -6.7 X-Spam_bar: ------ X-Spam_report: (-6.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1858623 <1858623@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The QEMU project is currently considering to move its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting older bugs to "Incomplete" now. If you still think this bug report here is valid, then please switch the state back to "New" within the next 60 days, otherwise this report will be marked as "Expired". Or please mark it as "Fix Released" if the problem has been solved with a newer version of QEMU already. Thank you and sorry for the inconvenience. ** Changed in: qemu Status: New =3D> Incomplete -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1858623 Title: VNC outputs garbage in zlib mode Status in QEMU: Incomplete Bug description: TL;DR: When QEMU is launched with VNC as the output and viewed with a client that defaults to zlib VNC encoding, the resulting output tends to accumulate artifacts. Reproduction: Launch QEMU (tried with versions 4.2.0 and 4.1.0 on Linux 64bit) with -v= nc 0.0.0.0:0 Connect to it with a VNC client that allows you to select encoding, i.e. = UltraVNC. Set encoding to zlib (type 6), 32bit color. As screen content changes it starts accumulating artifacts. Almost certai= n to appear if you open-close windows over a pattern. Does not seem to depend on guest used, but easier to reproduce with a GUI. Looks like this: https://orbides.org/img/vnc.png It appears to be a deflate glitch of some sort - all of the bad pixels are generated by length/distance codes. Can't narrow it down any more. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1858623/+subscriptions