Path: csiph.com!weretis.net!feeder8.news.weretis.net!fu-berlin.de!bofh.it!news.nic.it!robomod From: code@luigifab.fr Newsgroups: linux.debian.kernel Subject: HDMI black screen after 6.16.12 Date: Wed, 13 May 2026 22:50:02 +0200 Message-ID: X-Mailbox-Line: From debian-kernel-request@lists.debian.org Wed May 13 20:45:14 2026 Old-Return-Path: X-Amavis-Spam-Status: No, score=-2.098 tagged_above=-10000 required=5.3 tests=[BAYES_00=-2, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FOURLA=0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001] autolearn=no autolearn_force=no X-Policyd-Weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 CL_IP_EQ_HELO_IP=-2 (check from: .luigifab. - helo: .insect.birch.relay.mailchannels. - helo-domain: .mailchannels.) FROM/MX_MATCHES_NOT_HELO(DOMAIN)=0; rate: -3.5 X-Sender-ID: hostingeremail|x-authuser|contact@luigifab.fr Arc-Seal: i=1; a=rsa-sha256; d=mailchannels.net; s=arc-2022; cv=none; t=1778704136; b=4+2GBJITNObPae6IJ+6SMmZekUSuFex+6pGojI3rJ1IPvRdfTQ+iG0VQjExnY196MpTaX/ gHrucP4R7+0Il5JhbSSy641OXF1MAx6P4UYSKDUWYVuH+9VfNtw9nANnJE9Pg+kRnymMmM 5lV7EZ1I1rGQ4YMfp9E2iTLRhJWceZAhp2OqqMaHqCDsgMQsKzN89OIa93LQ4mo7aJPnw0 eDQld20Itl0ZpYDhHODZOCBhF7YIISehYPunEF8FfhdAH16Yj+D1eME3dE6PLd+WzT77n6 DK8bkqbaWCUiR/7Hv1NEXK1XAmUBKcYoiRvJuObIJi6ki6qPzGmIuqkYYYn2cA== Arc-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=mailchannels.net; s=arc-2022; t=1778704136; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding:dkim-signature; bh=Bv8qUL1LGqlkfjuRVcaWWhENhie8jXilCWFwf2B+0Ao=; b=UpMdsPoSd0cMuPjvtApQJBAjWWLVo5nrzq0+Uznb+BKW5ADASgLgwGpXU4bF0kWD1qnRw+ N9XZYUlRRB2hMJuW745NPRUVe/NadJHPK7HeehqmX2R8uQ0/RbBZcl77XFw/NadIWYzE7C dnlz78iWFIGUtAl4fmHjamnd5EAU0XeRiTWG4LlrNJGqSKHOWIvw4QZsb2oWi7SvKf6maT jjGlqKYWO161j3Dr3irR3jzNiK6f0NoSwZxhCrSb5BiN13yLVQvg+KNEcggh5gdxujV31Z xfhr5f9xYxYQgKOyO3I82InwD9eJvVlfgaElmYDHNGaDcM9HVnJN7w3R2PfcfA== Arc-Authentication-Results: i=1; rspamd-79cfc4d687-pgsjp; auth=pass smtp.auth=hostingeremail smtp.mailfrom=code@luigifab.fr X-Sender-ID: hostingeremail|x-authuser|contact@luigifab.fr X-Mc-Relay: Neutral X-Mailchannels-Senderid: hostingeremail|x-authuser|contact@luigifab.fr X-Mailchannels-Auth-ID: hostingeremail X-Tasty-Whispering: 54ca4f0e69e29729_1778704136615_2282814004 X-Mc-Loop-Signature: 1778704136615:1904285850 X-Mc-Ingress-Time: 1778704136614 MIME-Version: 1.0 X-Sender: code@luigifab.fr Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-Cm-Analysis: v=2.4 cv=GMJaEfNK c=1 sm=1 tr=0 ts=6a04df06 a=TSQq32kHcNy4Qz2QWhCTUg==:117 a=TSQq32kHcNy4Qz2QWhCTUg==:17 a=kj9zAlcOel0A:10 a=ZO-FvhSXZWM_DtuprBsA:9 a=CjuIK1q_8ugA:10 X-Cm-Envelope: MS4xfFIr2A9BQxnoBT0snLR8nccTO7NEGYys3gY/vXZPNyhBHz+XHVRKn4IGIGHNab3VtysUSfvylWwppQQn2Z2I4RLcDdYWO4FKUqKtFXanrGRZFAteFL58 3NlH4FnePxi+JF5lqcQk0ZuUp3Yv9JhyQNReZTGLmemlCYyIz0Rb3Rc3qHLWto0+VJiU3b/diyVkHy+gyk6s/FLlah1CAYtubIM= X-Authuser: contact@luigifab.fr X-Mailing-List: archive/latest/155239 List-ID: List-URL: List-Archive: https://lists.debian.org/msgid-search/1e76ce4b01e45351afcfa2eb754e0f77@luigifab.fr Approved: robomod@news.nic.it Lines: 17 Organization: linux.* mail to news gateway Sender: robomod@news.nic.it X-Original-Date: Wed, 13 May 2026 20:28:54 +0000 (UTC) X-Original-Message-ID: <1e76ce4b01e45351afcfa2eb754e0f77@luigifab.fr> Xref: csiph.com linux.debian.kernel:92483 Hello, I am reporting a regression in the amdgpu driver affecting HDMI output on a second display with "AMD A12-9800E RADEON R7 (4C+8G)" on all Debian testing kernels newer than 6.16.12+deb14+1-amd64. CPU/GPU : AMD A12-9800E RADEON R7 Distribution : Debian testing (forky) Display server : X11 Last working kernel : 6.16.12+deb14+1-amd64 First broken kernel : all official Debian testing kernels above 6.16.12, including 7.0 Since upgrading, the second display connected via HDMI is no longer activated when X starts (black screen with no signal). The primary display works normally. Rebooting on kernel 6.16.12 immediately restores normal dual-monitor operation.