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 aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFC4ACD6E5D for ; Fri, 5 Jun 2026 08:38:31 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by mx.groups.io with SMTP id smtpd.msgproc02-g2.3665.1780647428261312965 for ; Fri, 05 Jun 2026 01:17:08 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=DURrDS+N; spf=pass (domain: redhat.com, ip: 170.10.129.124, mailfrom: berrange@redhat.com) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1780647427; 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=DURrDS+NK8pL4jknJxHPe9wScg/LDJkABcOLxC44vtrm4ETfuwbGVhUhQ5AW3/AuLubu0E 8YhWcabmupTLERPI4ZjkWJJjFCjif5c8x9/qvQwPDA2DOHApU12wOMigxJmgBe7MaJKPvm 6yc6ndUuY6wJGq5i4ENFoEzGwNfGlVk= 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: Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= 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 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 X-Mimecast-MFC-PROC-ID: 3Ggfa_qjjxJ9CHIJtm3aJY_Pw3E_-7uAjI-1SFFYyXI_1780647040 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Fri, 05 Jun 2026 08:38:31 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/238152 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 :|