From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751737AbbJaVx2 (ORCPT ); Sat, 31 Oct 2015 17:53:28 -0400 Received: from mail-bn1on0066.outbound.protection.outlook.com ([157.56.110.66]:55526 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750810AbbJaVx0 (ORCPT ); Sat, 31 Oct 2015 17:53:26 -0400 Authentication-Results: spf=none (sender IP is 165.204.84.222) smtp.mailfrom=amd.com; lists.freedesktop.org; dkim=none (message not signed) header.d=none;lists.freedesktop.org; dmarc=permerror action=none header.from=amd.com; X-WSS-ID: 0NX3PVR-08-EW6-02 X-M-MSG: Subject: Re: Mobility Radeon HD 4530/4570/545v: flicker in 1920x1080 To: Pavel Machek , , , kernel list , References: <20151031201344.GA30459@amd> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: <563522C5.1000206@amd.com> Date: Sat, 31 Oct 2015 21:21:25 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; 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But > my monitor is native 1920x1080, so that mode looks pretty ugly on > screen. If I go to 1920x1080, I see colored horizontal lines (often > black) as soon as there's graphics activity. > > pavel@half:~$ xrandr > Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 > VGA-0 connected 1920x1080+0+0 (normal left inverted right x axis y > axis) 478mm x 268mm > 1920x1080 60.00*+ > 1600x1200 60.00 > 1680x1050 59.95 > 1280x1024 75.02 60.02 > 1440x900 59.89 > 1024x768 75.08 60.00 > 800x600 75.00 60.32 > 640x480 75.00 60.00 > 720x400 70.08 > pavel@half:~$ xrandr --output VGA-0 --mode 1600x1200 > pavel@half:~$ xrandr --output VGA-0 --mode 1920x1080 > pavel@half:~$ xrandr --output VGA-0 --mode 1600x1200 > > > This is Acer notebook, > > 01:00.0 VGA compatible controller: Advanced Micro Devices, > Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4530/4570/545v] > > Ouch, and power consumption seems to be 8W too high. (25W instead of > 17W), I believe it started when I added radeon firmware, but will > check. It does not go lower even when I switch to text console. > > Any ideas? Alex probably knows more about this, but it sounds like problems with switching the memory clocks on 3D load. Try to disable power management completely with radeon.dpm=0 on the kernel command line or nailing the hardware at a specific power level using sysfs. Power consumption would be totally awkward, but it should help nailing down the problem. Regards, Christian. > > Pavel