From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933784AbeBMIuf (ORCPT ); Tue, 13 Feb 2018 03:50:35 -0500 Received: from mail-wr0-f182.google.com ([209.85.128.182]:41702 "EHLO mail-wr0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933631AbeBMIue (ORCPT ); Tue, 13 Feb 2018 03:50:34 -0500 X-Google-Smtp-Source: AH8x227P5TaU30G8w/OIQLuxMsP3iYXOZEGwwYeZPI8DUpQ+Nu5dHySmNpuBcAm2WsRxihWSCL9ANA== Date: Tue, 13 Feb 2018 09:50:30 +0100 From: Pali =?utf-8?B?Um9ow6Fy?= To: Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: Thinkpad X1 Carbon 3rd - Reducing the compressed framebuffer size Message-ID: <20180213085030.kiksdi2a7ksae5wz@pali> References: <20180206152143.vea6si7ncjj7sxyq@pali> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20180206152143.vea6si7ncjj7sxyq@pali> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 06 February 2018 16:21:43 Pali Rohár wrote: > Hi! I'm periodically getting following message in dmesg on Lenovo > Thinkpad X1 Carbon 3rd generation: > > [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS. > > In BIOS I already set GPU size to 512M, but this did not help. Also > update to last BIOS version did not help. > > So why this message is periodically print in dmesg? And what can I do > with this problem? > > And why cannot Linux kernel allocate itself more memory for GPU (if BIOS > can/could do that)? Is not 512MB for GPU enough? And here is output from lspci, which clearly says that 512MB is already set for GPU: $ lspci -v -s 00:02.0 00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo HD Graphics 5500 Flags: bus master, fast devsel, latency 0, IRQ 46 Memory at e0000000 (64-bit, non-prefetchable) [size=16M] Memory at c0000000 (64-bit, prefetchable) [size=512M] I/O ports at 3000 [size=64] [virtual] Expansion ROM at 000c0000 [disabled] [size=128K] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities: [a4] PCI Advanced Features Kernel driver in use: i915 Kernel modules: i915 -- Pali Rohár pali.rohar@gmail.com