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Sun, 3 Oct 2021 18:09:49 +0000 From: Chuck Lever III To: "dri-devel@lists.freedesktop.org" , Linux Kernel Mailing List Subject: 572994bf18ff prevents system boot Thread-Topic: 572994bf18ff prevents system boot Thread-Index: AQHXuIHaQkpNBKzpEUm+VGhDUNOUhg== Date: Sun, 3 Oct 2021 18:09:49 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3654.120.0.1.13) authentication-results: lists.freedesktop.org; dkim=none (message not signed) header.d=none;lists.freedesktop.org; dmarc=none action=none header.from=oracle.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 9d755003-88b2-4fc6-71c6-08d98698fd6b x-ms-traffictypediagnostic: SJ0PR10MB4623: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:1923; x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 0iUPWDm1uhv0A1+whECtKIGENQVlRfKFtV48C2Sv0vQ6h0l5UeFBm1k30QhWoWTCqAQ6/YDStRxSaF8EQXYRxgYy2eht6d66+HhYzKsLYKJlX0WoRqjSQx6P0THmSq9jDOm8cKUCB6xPcJqlWlCTVA7ws8+Kex6oBmsW5gadT5dqnEXvHvLlRv8gEPolQu0UlmharbhZQKOdt/wXsIjp7hcL2/BykeM//Fd8AUHWyekZMshDsnugsaXnqtfnzXsbn9RYFx/4/2ud6TSMD4QgnFMcEQaJbNdY61/kyJbVCw1Vm02fnn2VaLY179wWC9Cq24jxQWxW2VzvYAruam1KslDqueEEXNxXet40ZbHKC+yIVug/IKkH3uXnEe/rBaVilkjF/4cclWCsM6DTZhVwSnX5WGt7Rr3tNMp7Vs2g7yo3cGk8mD3GAlXkZmfLfIr8eD1fbhmmajneMd84sUzsKPgiYhBw/qNGrdPzoLyZXCxvXScsf7gGCl3kcnESDuQ6XuA9/Qr7IzhhuSYms+2yy2X5w6111NA9jFKyZNrKpwlH7Fq72Y75iX4YxWc082MWIOB3f0HuUu7ql/+LBNO7Sh54ZhnnRg91ZmXc6MLUS8zo1Q+6DdQ22GR90PGTIoqXjcs7+kAVjuGY//mpctv9pbEKeA/Ur0G+QLmOevucRpjsqhPtiTFCikCYvGMShB4KcNsX5qI/Pg3JePyjRgl6SeHNJTScHx2+c46gfeMWCjk= x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SJ0PR10MB4688.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(366004)(4744005)(6506007)(122000001)(6486002)(71200400001)(6512007)(66556008)(66476007)(8936002)(66946007)(66446008)(64756008)(186003)(76116006)(91956017)(86362001)(38100700002)(508600001)(2906002)(83380400001)(8676002)(26005)(38070700005)(110136005)(33656002)(316002)(5660300002)(36756003)(2616005)(45980500001);DIR:OUT;SFP:1101; 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charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SJ0PR10MB4688.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9d755003-88b2-4fc6-71c6-08d98698fd6b X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Oct 2021 18:09:49.3657 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: JPFmRFel+pZlPuxBxuK97yfNThvKW1MuLtfSOvgQC2NRyQHShhpeWd+Sf7njmicg19Z2AmpKRtOvj+/AAzYb1g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR10MB4623 X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10126 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 mlxlogscore=917 adultscore=0 bulkscore=0 suspectscore=0 malwarescore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109230001 definitions=main-2110030132 X-Proofpoint-GUID: VR4bW_vHmNciFMh0y8LYTbWPH4YpI4nd X-Proofpoint-ORIG-GUID: VR4bW_vHmNciFMh0y8LYTbWPH4YpI4nd Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi- After updating one of my test systems to v5.15-rc, I found that it becomes unresponsive during the later part of the boot process. A power-on reset is necessary to recover. I bisected to this commit: 572994bf18ff ("drm/ast: Zero is missing in detect function") Checking out v5.15-rc3 and reverting this commit enables the system to boot again. 0b:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics = Family (rev 30) (prog-if 00 [VGA controller]) DeviceName: ASPEED Video AST2400 Subsystem: Super Micro Computer Inc X10SRL-F Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-= Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=3Dmedium >TAbort- = SERR-