From owner-freebsd-x11@freebsd.org Mon Dec 31 14:04:59 2018 Return-Path: Delivered-To: freebsd-x11@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9DFEA1435783 for ; Mon, 31 Dec 2018 14:04:59 +0000 (UTC) (envelope-from ml@netfence.it) Received: from soth.netfence.it (net-2-44-121-52.cust.vodafonedsl.it [2.44.121.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "mailserver.netfence.it", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A71186D8A3 for ; Mon, 31 Dec 2018 14:04:58 +0000 (UTC) (envelope-from ml@netfence.it) Received: from alamar.ventu (alamar.local.netfence.it [10.1.2.18]) (authenticated bits=0) by soth.netfence.it (8.15.2/8.15.2) with ESMTPSA id wBVE4nHX025397 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO) for ; Mon, 31 Dec 2018 15:04:55 +0100 (CET) (envelope-from ml@netfence.it) X-Authentication-Warning: soth.netfence.it: Host alamar.local.netfence.it [10.1.2.18] claimed to be alamar.ventu Subject: [SOLVED] Re: Radeon HD 4250: screen going blank every few seconds To: freebsd-x11@freebsd.org References: <4560f9e2-efcf-a1f5-728c-c26fcec34353@netfence.it> From: Andrea Venturoli Message-ID: Date: Mon, 31 Dec 2018 15:04:49 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: A71186D8A3 X-Spamd-Bar: +++ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [3.85 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; IP_SCORE(0.44)[ip: (1.13), ipnet: 2.44.0.0/16(0.56), asn: 30722(0.45), country: IT(0.08)]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-x11@freebsd.org]; HAS_XAW(0.00)[]; AUTH_NA(1.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_SPAM_MEDIUM(0.97)[0.971,0]; TO_DN_NONE(0.00)[]; NEURAL_SPAM_SHORT(0.56)[0.560,0]; MX_GOOD(-0.01)[cached: mx.netfence.it]; NEURAL_SPAM_LONG(0.99)[0.986,0]; DMARC_NA(0.00)[netfence.it]; R_SPF_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:30722, ipnet:2.44.0.0/16, country:IT]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-x11@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: X11 on FreeBSD -- maintaining and support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 31 Dec 2018 14:04:59 -0000 On 12/31/18 8:27 AM, Andrea Venturoli wrote: >> The graphics hardware you're using is also quite old, and not very >> well supported. > > I've been using an HD4200 for several years: it's listed as "Works" on > the AMD-GPU-Matrix page and I've been very happy with it. > > AFAICT, HD4250 should be the same chip (RS880), just with a slightly > higher clock and some dedicated RAM, so I thought it would work as well > (and with the same configuration). > I understand the devil is in the details, though. I think I reached a *good* configuration by trial and error. I went into BIOS settings and disabled HDMI audio (probably not something that matters) and choose to use only "sideport" memory (not "UMA" or "sideport+UMA"). At this point, with a DVI cable I can achieve full resolution (1920x1200) without glitches. As I'm happy with this, I'm not trying which of the two settings was the culprit, whether this works with an HDMI cable too, changing X.Org version or driver/kernel module, etc... :) When I have time I'll try adding the second screen, but that's not something I can't live without. In the end I think HD4250 could be added as "Working" in the Graphic Wiki. Please ask if you'd like to have any info. bye & Thanks av.