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 lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DAF41CD6E6B for ; Fri, 5 Jun 2026 08:11:17 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wVPdi-0002bF-Cn; Fri, 05 Jun 2026 04:10:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wVPdh-0002b5-55 for qemu-devel@nongnu.org; Fri, 05 Jun 2026 04:10:49 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wVPdf-0000NI-Fx for qemu-devel@nongnu.org; Fri, 05 Jun 2026 04:10:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1780647045; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YYhL4k6H0XA5raAWVSntoT/50RB3YG1rpxzsT/RplBU=; b=PaR7YyMw26rH+ywQXzCs8S8c1UF91GcrhTpBh+rgQFl0JUd33Xn0fZcP6FjtUmKIih2Dz7 /9zoUsdcaeyD9aiuSxGNXv5VWZ8f0ISyS0ytH5UPP8Poa1yRw9NiaTcJxxe0DNv3T965tC pSTH/y3swy86bitEXODZV/CqzJhwhbc= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-615-ZBVqBm7SP1KBlRgOkG8KWA-1; Fri, 05 Jun 2026 04:10:41 -0400 X-MC-Unique: ZBVqBm7SP1KBlRgOkG8KWA-1 X-Mimecast-MFC-AGG-ID: ZBVqBm7SP1KBlRgOkG8KWA_1780647040 Received: from mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.95]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id C6C4A1944D1B; Fri, 5 Jun 2026 08:10:39 +0000 (UTC) Received: from redhat.com (unknown [10.44.50.34]) by mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id C41231624; Fri, 5 Jun 2026 08:10:35 +0000 (UTC) Date: Fri, 5 Jun 2026 09:10:32 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= Cc: Akihiko Odaki , =?utf-8?Q?Marc-Andr=C3=A9?= Lureau , Alexander Kanavin , Richard Purdie , Mathieu Dubois-Briand , openembedded-core@lists.openembedded.org, Quan.Sun@windriver.com, QEMU Developers Subject: Re: ui: Regression calling eglInitialize() since v11.0.0 Message-ID: References: <20260528202639.4097815-1-Quan.Sun@windriver.com> <7da33301e8a0bae93a33695b4fd41f67a08e1b9f.camel@linuxfoundation.org> <3bde2ef8-5565-4495-9904-dd3db839de1d@windriver.com> <237df978-b1f2-4c66-ab4c-5894f7a44a02@mailo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <237df978-b1f2-4c66-ab4c-5894f7a44a02@mailo.com> User-Agent: Mutt/2.3.2 (2026-04-26) X-Scanned-By: MIMEDefang 3.6 on 10.30.177.95 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 8 X-Spam_score: 0.8 X-Spam_bar: / X-Spam_report: (0.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_SBL_CSS=3.335, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Fri, Jun 05, 2026 at 08:35:13AM +0200, Philippe Mathieu-Daudé wrote: > On 29/5/26 18:29, Alexander Kanavin wrote: > > On Fri, 29 May 2026 at 18:10, Quan Sun via lists.openembedded.org > > wrote: > > > This is likely a real QEMU 11.0 regression, but may not be in QEMU's > > > code itself. The QEMU 11.0 likely changed its display initialization to > > > be multi-threaded or reordered it, triggering a race condition in the > > > host's Wayland/EGL/Mesa stack. Maybe setting SDL_VIDEODRIVER=x11 could > > > solve the issue. > > > > > > This issue is different from the "glx: failed to create dri3 screen / > > > failed to load driver: vgem error" seen earlier, which was a missing GPU > > > driver issue on the host. > > > > > > If you have any detailed logs, please share with me and so I have more > > > contexts. > > > > It's the same issue, I assure you. Qemu 10.x prints nothing and simply > > starts, while qemu 11.x first tries glx/dri3 , then wayland/egl/vgem > > (even though there's no wayland running on the build hosts), and then > > finally crashes, with the traceback that RP provided. > > > > I don't think it's a race condition, as the failure is deterministic, > > but I agree that something has changed in qemu's GL initialization > > sequence. > > Cc'ing Marc-André & Akihiko > > Context: > > https://lore.kernel.org/openembedded-core/7da33301e8a0bae93a33695b4fd41f67a08e1b9f.camel@linuxfoundation.org/ If it is an suspected regression between 10.2 and 11.0, then I'd suggest someone who is able to reproduce the issue reliably should do a 'git bisect' to narrow it down precisely. With regards, Daniel -- |: https://berrange.com ~~ https://hachyderm.io/@berrange :| |: https://libvirt.org ~~ https://entangle-photo.org :| |: https://pixelfed.art/berrange ~~ https://fstop138.berrange.com :|