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Thu, 12 Feb 2026 16:35:09 +0000 Date: Thu, 12 Feb 2026 17:35:05 +0100 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Marek =?utf-8?Q?Marczykowski-G=C3=B3recki?= Cc: xen-devel , intel-xe@lists.freedesktop.org Subject: Re: Graphical glitches (not refreshing?) with Linux's xe driver + Xen 4.19 Message-ID: References: Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-ClientProxiedBy: MR1P264CA0110.FRAP264.PROD.OUTLOOK.COM (2603:10a6:501:50::19) To CH7PR03MB7860.namprd03.prod.outlook.com (2603:10b6:610:24e::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH7PR03MB7860:EE_|DM6PR03MB5356:EE_ X-MS-Office365-Filtering-Correlation-Id: be445fad-fa01-4265-9eb4-08de6a54afd0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?utf-8?B?alpkbGgyNFB0cnBBR25YVWprSHFVQU54Mk9RdExBWkIxSEM0WElmNUgwUzMy?= =?utf-8?B?VThCMFRSTFB6amoveXUyVnk2Sy9wVG93QjlRUERjUjFJZU02dXVlekZScDFC?= =?utf-8?B?M3duWXJCZXdxajF0Q1M1a1liclZCOXU0OGdZS1l2NDhyRWtRVThUemIrYWdu?= =?utf-8?B?bXN0V0hZdGJuVEFzK1BkUmUrNVNuK1pwWEwxWnRvMG1Ld0RBdytMVlBtdEhl?= =?utf-8?B?aDNIR29GMGhsSEdsN01WRVkvMU1EWmR6RkxVQlZiVFI1YW5Kbi9pNThmOWVH?= =?utf-8?B?ekthQWFydWwzOUk1NWlnYXlZbm5sYXQxVkcxdkJVUjlOVHA4R0VhUmVXL3FH?= =?utf-8?B?NEZUT2JNUHI5VUxpUVR3UU8wWUNxcElXS0hpK0RtSm9uTXJlSDAvNk9sODRL?= =?utf-8?B?d0UrVnNlNEZJa253K1hZZ0xMVk1ZU1dHdGxRVU1aZldwekdkamltdDlEMXFP?= =?utf-8?B?dkp2VEJNRmdZa3dqSG1tTnp5MHlLakFRNVVKYkFsc3VOM2dBQ0tvcVRQZlY1?= =?utf-8?B?MTYyMlp6VFB3MHVmM0RDRTVyYWpCQ0xTK3dhV0FXaytYSjdXaXhDL0VZZ3B6?= =?utf-8?B?bzc0MG1XVThOZCsyNmQ1VHVEVUUxOHdXeG1laUcrQ2xLcE4rckptNFpONkty?= =?utf-8?B?S3M1UzZzaEtVRmdwVlYzS1UreHAwWjZEOGtWNzg3TDNuS2ZPT2V5ZlphSFJK?= =?utf-8?B?QUxuRWVDWTRudFhJMUlyU0dFWUpJR2dyM1ArbjZkL0dLeG5tWi90bWVYYlor?= =?utf-8?B?Tk03Mk1MaUcyZFhwT1JUb2FiQjVmOEhSank0NzZvRXVPVXpGTW5tRFUzbjVa?= =?utf-8?B?Y2RZOU9VdVcrWG0xOXFnUllSR2FpcG9qNC8rSkVOcFVvN0dmTms1NVBHMGpL?= =?utf-8?B?REpzcmFkZjUzR2V0d2xlYldxdEg2NTIwdmt0TE8zVlBrbWZ5MnBUMEtvcU8r?= =?utf-8?B?a0FxelpQNG95N2tzU3daTURNZm9aSWE3d0c1QXJWR2tqSERZdCs3bUNmUk5K?= =?utf-8?B?ZWkvR1lMSmRGVHcxUTJ2ZEVhQ2d6NlBwbHhlRTRhd0UwUll0QkNNSFhMYXFJ?= =?utf-8?B?em44UUdoMXpteHN0Y0kyN3pGRms5a3lCTDlWNU1EUDdLbW10RWhhRnVqWFRL?= =?utf-8?B?MzFmaVZiWklOd2dqdE5XSEVxSGJLMVlRbUJqTGxZTUhrdUtyejk1dlE1NWZo?= =?utf-8?B?L3gxZTkyT0VMY1ZtNzVzQi9STU9hcStVaXNFajlSL2lsYlJzNlNOSzZER0JF?= =?utf-8?B?WThNY25XSnZDbU94N292TDZGS016cmsxY2pZcnJwbWlyVjdmTXVVa0hYelBD?= =?utf-8?B?NjVVU1VCd2NiaGIwdWo4Qm9UYzJia2FCYWFLTVVtdjZBZFFta3Exb3FtT3li?= =?utf-8?B?b2UyYVhsVTFlNGtraGUwOGlGcFVhK0hqOHZOM0tJeXFpYVhRaG5aZy9nMjVz?= =?utf-8?B?S1NzcWIwRitWaFNFWU1DZUdWRDNmR2pJc2kxKzdtcnZGaFh5eTlYUExQSCtv?= =?utf-8?B?Tmt6WmFIK1JZQ0wvbzVKWFhwTStSbmJMemhzM2ZGQWpvcytvTTBPclpJR3RI?= =?utf-8?B?dlJicUxxblhKeWpkVnJJS2wyMlpVUmk0cjd3QXdmWDBmSW93b0xwS2JHcVYz?= =?utf-8?B?YkZpYkRDLzZjOGtaajVQUXU5bWZhWFB4R0RsZERLUVpmejJFSWtWOERrdWVE?= =?utf-8?B?VVZmUGNaWWxhSEZXZVpWYklFcnMyNlN3ZktabXBqZ1RHSXY0Qy9vdVBjODBo?= =?utf-8?B?MjBTQkJTVms4Zms3b0lsQUExelA5NDRuelQ0VE1ETUthZHhZN2lhZUp2bVFu?= =?utf-8?B?cUJSZkdEcS9rdXlRT3VCU3pidDd3VkZoTDJHQVoyTTY4aWRsbjEyY1Rsalhw?= =?utf-8?B?a2xTbTZIeDhKM2lFWTA0NDNNOERoMHJiODFyV0hDcUtueG1IZjRTSHJBdWY3?= =?utf-8?B?cCsza05sYnk0RGlFZ3paSGNrTGFnSm1UcW5LMFFtLzc4U2lDYkNBd1NCYVIr?= =?utf-8?B?U3BiNTlxa3AvL254ZHcvYjFVbTd0Nm5jU1FsQllQS1VuUDV6N1BJWXJlazZ3?= =?utf-8?B?YTJhZHpMZW1DUnVFSnVYa3JpSmNCcjYyWjl5SG5sVDdYeGN0ZFFNMjZhQmlD?= =?utf-8?Q?1KpE=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255; 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This is > > > > > the first one that uses "xe" instead of "i915" Linux driver for iGPU. > > > > > I test it with Qubes OS 4.3, which uses Xen 4.19.4 and PV dom0 running > > > > > Linux 6.17.9 in this test. > > > > > > > > Not sure it's going to help a lot, but does using a PVH dom0 make any > > > > difference? > > > > > > Yes, it makes a difference. I end up with black screen as soon as dom0 > > > starts... And due to unrelated bug (in xhci console code?), I don't have > > > kernel messages :/ > > > > Hm, that's ... very helpful. We should fix the xhci stuff so we know > > what's going on there. Is the xhci bug also PVH only, or PV is > > equally affected? > > XHCI console works just fine with PV dom0. But I just noticed I had > older Xen binary there today, will re-test on the same 4.19.4 again. And > then will submit separate bug report (even if that's likely be me fixing > it anyway). OK, could you also post whatever output you get when using a PVH dom0 with `sync_console` added to the Xen command line? Thanks, Roger.