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=-0.8 required=3.0 tests=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 71E34C74A4B for ; Thu, 11 Jul 2019 09:29:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4D454208E4 for ; Thu, 11 Jul 2019 09:29:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728311AbfGKJ3W convert rfc822-to-8bit (ORCPT ); Thu, 11 Jul 2019 05:29:22 -0400 Received: from mail.fireflyinternet.com ([109.228.58.192]:63720 "EHLO fireflyinternet.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726088AbfGKJ3V (ORCPT ); Thu, 11 Jul 2019 05:29:21 -0400 X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from localhost (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP (TLS) id 17217972-1500050 for multiple; Thu, 11 Jul 2019 10:29:19 +0100 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT To: James Bottomley , intel-gfx@lists.freedesktop.org From: Chris Wilson In-Reply-To: <1561834612.3071.6.camel@HansenPartnership.com> Cc: linux-kernel References: <1561834612.3071.6.camel@HansenPartnership.com> Message-ID: <156283735757.12757.8954391372130933707@skylake-alporthouse-com> User-Agent: alot/0.6 Subject: Re: screen freeze with 5.2-rc6 Dell XPS-13 skylake i915 Date: Thu, 11 Jul 2019 10:29:17 +0100 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoting James Bottomley (2019-06-29 19:56:52) > The symptoms are really weird: the screen image is locked in place. > The machine is still functional and if I log in over the network I can > do anything I like, including killing the X server and the display will > never alter. It also seems that the system is accepting keyboard input > because when it freezes I can cat information to a file (if the mouse > was over an xterm) and verify over the network the file contents. > Nothing unusual appears in dmesg when the lockup happens. > > The last kernel I booted successfully on the system was 5.0, so I'll > try compiling 5.1 to narrow down the changes. It's likely this is panel self-refresh going haywire. commit 8f6e87d6d561f10cfa48a687345512419839b6d8 Author: José Roberto de Souza Date: Thu Mar 7 16:00:50 2019 -0800 drm/i915: Enable PSR2 by default The support for PSR2 was polished, IGT tests for PSR2 was added and it was tested performing regular user workloads like browsing, editing documents and compiling Linux, so it is time to enable it by default and enjoy even more power-savings. Temporary workaround would be to set i915.enable_psr=0 -Chris