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Mon, 27 Apr 2026 23:32:17 +0000 Message-ID: Date: Mon, 27 Apr 2026 16:32:14 -0700 User-Agent: Mozilla Thunderbird Subject: Re: further issues with MGA G200 graphics chipset From: Jacob Keller To: Thomas Zimmermann , Jocelyn Falempe , "airlied@redhat.com" CC: , "linux-kernel@vger.kernel.org" , Pasi Vaananen References: <76aba88d-ec23-4b3c-ad91-83face0c3e94@intel.com> <6ec01703-31e0-4998-9508-a5a115ae7bc9@intel.com> <14aa4840-29c4-46df-b60d-8e1b92494ad2@redhat.com> <5155f29b-bc4d-4e60-9a26-22d568c43e46@redhat.com> <0be82b55-0f78-4ef9-8b50-f068ec36ec4f@suse.de> <3def4337-4297-45fa-8825-4147abda49f4@suse.de> <174f2602-ee3b-4cba-b757-47c44e0fb10a@intel.com> Content-Language: en-US In-Reply-To: <174f2602-ee3b-4cba-b757-47c44e0fb10a@intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0315.namprd03.prod.outlook.com (2603:10b6:303:dd::20) To DS0PR11MB7579.namprd11.prod.outlook.com (2603:10b6:8:14d::5) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR11MB7579:EE_|SA1PR11MB8839:EE_ X-MS-Office365-Filtering-Correlation-Id: b77499e7-8ed1-4e73-e61b-08dea4b53821 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|14066099003|18002099003|22082099003|56012099003; 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Could you please also tell me your system's exact Matrox chipset >> or its PCI id? >> > > Here's the lspci output: > >> >> b5:00.0 VGA compatible controller [0300]: Matrox Electronics Systems Ltd. Integrated Matrox G200eW3 Graphics Controller [102b:0536] (rev 08) (prog-if 00 [VGA controller]) >> DeviceName: Embedded Video >> Subsystem: Dell Integrated Matrox G200eW3 Graphics Controller [1028:0d38] >> Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- >> Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- > Interrupt: pin A routed to IRQ 16 >> NUMA node: 0 >> IOMMU group: 16 >> Region 0: Memory at e5000000 (32-bit, prefetchable) [size=16M] >> Region 1: Memory at e6810000 (32-bit, non-prefetchable) [size=16K] >> Region 2: Memory at e6000000 (32-bit, non-prefetchable) [size=8M] >> Capabilities: [dc] Power Management version 3 >> Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) >> Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- >> Kernel driver in use: mgag200 >> Kernel modules: mgag200 > > The device ID looks to be 0x0536, and the subdevice ID is Dell 0x0D38. I > don't see anything specifically related to mini display port. It is > plausible there is an encoder between that output and the G200eW3. > >> The patch is attached for your testing. It would work against drm-tip or >> v7.1-rc1. >> > > I'll give it a shot. > The systems that were having trouble are currently being used by other folks on my team to check other issues. It might take a day or two before I can get access again to test this. I'll update you once I've gotten access and had a chance to test the changes. Thanks, Jake