From patchwork Wed May 6 02:50:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AceLan Kao X-Patchwork-Id: 1284019 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.ubuntu.com (client-ip=91.189.94.19; helo=huckleberry.canonical.com; envelope-from=kernel-team-bounces@lists.ubuntu.com; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=canonical.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=he2eXtH3; dkim-atps=neutral Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49H1Kg2yP3z9sRY; Wed, 6 May 2020 12:50:15 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.86_2) (envelope-from ) id 1jWA8P-0004TQ-T3; Wed, 06 May 2020 02:50:09 +0000 Received: from mail-pl1-f194.google.com ([209.85.214.194]) by huckleberry.canonical.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1jWA8O-0004TJ-EY for kernel-team@lists.ubuntu.com; Wed, 06 May 2020 02:50:08 +0000 Received: by mail-pl1-f194.google.com with SMTP id u10so91558pls.8 for ; Tue, 05 May 2020 19:50:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=m6cPfqRLnlqEOkOkC8jc04fSSZQU6DTBVbQ6Spd1MI4=; b=he2eXtH3nUB2Ae7gThU5XwJCoJZRz5IuTmm/Y/f4G7zES7Kbqm6BGDNj06SeTHDtDl 7HIBF81Tll8OQsacVZ9KDH+6ip36Jag5raVUmUQyYxtMgsp8t9wJ2Wj3BpV86IBX4Z9j xnS9fbFBC3P7pu8fQ6HReENU+EFje/O4Oe44BeoXoXcIyVbQJI+B/gy7y5zC8UXBCVGF WiL8HpfKfIN2Hr1DFm4MZIWlMc94m92ig2UnAFSouVMTJtcXMhRdsr0mfZYV+QNsRNri 6e5VJhfDhCwOm0qAsE3BlNsgDXZzXlARUcozb3rwl2uPwdVOGFjInl6WWRAjt7Pnn3aM FFAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:subject:date:message-id :mime-version:content-transfer-encoding; bh=m6cPfqRLnlqEOkOkC8jc04fSSZQU6DTBVbQ6Spd1MI4=; b=X/Qiaw4AJO1MLrSgxVUSHNXSzeub2gkGqNq3kH8c6qiFezrMCWYvfkSzq0OT/ctQnz XWJilae9VHr9DbIbpaGgNwSG3De1NeXN3I4m4oPvUA/1LGoKoaPQRyWik5exfZAxZVpU 1DwnRfYzP49ZcVM/xMdaIHHsROnZLvS0jLjFjTxWtPxcLSykpefH2iiLpXgWRSOY53GU chfSlNrwcAD5NUGTR+LbSOHM35Gq3Nt4V7bIbwCDNXDhfZ2hcuQKpkD4MAqcHv8uQgmh 4yAq75ywib2oLZciM8Mapz9zaff8iXDraLOzqPUz2tia5qu6QdDJRCHTnzBLJzNLmEfT bAGg== X-Gm-Message-State: AGi0PuYgEBcwReXqpzQjgfiuYxAOAU2/sFP9F1Lcufy+4k0TrLUuU+Ya LnhqnyZcflUncxjmX3ZP/+1QtaMG X-Google-Smtp-Source: APiQypLIJk4PG/w21eDON23plJ9mXRCLYnd6VeGACDoelZbjmPA/4rHRWq9vh5ozGLAie/9PHwZMRw== X-Received: by 2002:a17:90a:1f4b:: with SMTP id y11mr6710654pjy.136.1588733406414; Tue, 05 May 2020 19:50:06 -0700 (PDT) Received: from localhost (220-135-95-34.HINET-IP.hinet.net. [220.135.95.34]) by smtp.gmail.com with ESMTPSA id y21sm209899pfn.148.2020.05.05.19.50.05 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 May 2020 19:50:05 -0700 (PDT) From: AceLan Kao To: kernel-team@lists.ubuntu.com Subject: [PATCH 0/1][SRU][Focal] Dell XPS 13 9300 mirror mode doesn't work sometimes with WD19TB Date: Wed, 6 May 2020 10:50:03 +0800 Message-Id: <20200506025004.630079-1-acelan.kao@canonical.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" BugLink: https://bugs.launchpad.net/bugs/1877013 [Impact] Connect HDMI monitor on WD19TB dock and connect WD19TB to Dell XPS 13 9300, toggling the display mode to mirror sometimes got a blank screen on external monitor. [Fix] After bisect kernel and found below commit(from v5.7-rc2) improves the stability bcad588dea53 drm/i915/perf: Do not clear pollin for small user read buffers [Test] Verified on Dell XPS 13 9300 with WD19TB docking station, the fail rate becomes from 1/2 to 1/30 [Regression Potential] Low, this commit has been CC'd to stable, so we will have this soon. [Misc] OEM-5.6 has this commit from v5.6.6 stable update Ashutosh Dixit (1): drm/i915/perf: Do not clear pollin for small user read buffers drivers/gpu/drm/i915/i915_perf.c | 65 ++++++-------------------------- 1 file changed, 11 insertions(+), 54 deletions(-)