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Mon, 7 Sep 2026 15:21:04 +0000 Received: from CPUPR80MB6583.lamprd80.prod.outlook.com ([fe80::26cd:a90b:7748:403d]) by CPUPR80MB6583.lamprd80.prod.outlook.com ([fe80::26cd:a90b:7748:403d%4]) with mapi id 15.21.0382.014; Mon, 7 Sep 2026 15:21:04 +0000 From: Danilo Machado To: "linux-kernel@vger.kernel.org" , "amd-gfx@lists.freedesktop.org" CC: "alexander.deucher@amd.com" , "dri-devel@lists.freedesktop.org" , "linux@leemhuis.info" Subject: Re: [BUG REPORT] AMD Radeon R9 380 (Tonga) - HDMI no signal after suspend / regression tracking update Thread-Topic: [BUG REPORT] AMD Radeon R9 380 (Tonga) - HDMI no signal after suspend / regression tracking update Thread-Index: AQHdPtw9Ub0bdlVoJkOLBrcx72wrOA== Date: Mon, 7 Sep 2026 15:21:04 +0000 Message-ID: Accept-Language: pt-BR, en-US Content-Language: pt-BR X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-publictraffictype: Email x-ms-traffictypediagnostic: CPUPR80MB6583:EE_|CPUPR80MB429769:EE_ x-ms-office365-filtering-correlation-id: bb67ec1a-81b5-4c89-a678-08df0cf3a223 x-microsoft-antispam: BCL:0;ARA:14566002|25031999004|21061999006|41001999006|8062599012|8060799015|24121999003|19110799012|24021099003|25010399006|22091999003|55001999006|31061999003|15080799012|15030799006|51005399006|5062599005|4295299021|440099028|3412199025|4302099013|102099032|1602099012|40105399003|2607281247196008|10035399007; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-OriginatorOrg: sct-15-20-9412-4-msonline-outlook-665fe.templateTenant X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: CPUPR80MB6583.lamprd80.prod.outlook.com X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-CrossTenant-Network-Message-Id: bb67ec1a-81b5-4c89-a678-08df0cf3a223 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Sep 2026 15:21:04.6289 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CPUPR80MB429769 #regzbot back in-progress=0A= #regzbot monitor https://bugs.launchpad.net/ubuntu/+source/linux/+bug/21423= 89=0A= #regzbot monitor https://gitlab.freedesktop.org/drm/amd/-/work_items/5123= =0A= =0A= Hi Thorsten, Alex, and Linux Kernel Maintainers,=0A= =0A= I am writing to update the status of this regression after checking the Reg= zbot tracking dashboard:=0A= https://linux-regtracking.leemhuis.info/regzbot/regression/lore/CAOnW2VTGBP= =3DMMWM=3DW41uPDLrzTVHM1sw8P1myvftnNk0vEMMFw@mail.gmail.com/=0A= =0A= The dashboard currently lists this issue as "fizzled out / resolved: inconc= lusive", but I want to clarify that this bug is ACTIVE, UNRESOLVED, and act= ively tracked. The lack of recent email activity on LKML was due to ongoing= technical data collection on Launchpad and GitLab while awaiting upstream = feedback.=0A= =0A= Current Status & Verification:=0A= =0A= 1. Launchpad Report (#2142389):=0A= - Status: Confirmed (assigned to maintainer Timo Aaltonen).=0A= - Heat/Users: 220 Bug Heat points with 44+ explicitly confirmed affected= users across various AMD architectures (Tonga R9 380, Polaris RX 400/500, = and recent Vega APUs).=0A= - Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2142389=0A= =0A= 2. Freedesktop GitLab Issue (#5123):=0A= - Status: Open.=0A= - Link: https://gitlab.freedesktop.org/drm/amd/-/work_items/5123=0A= =0A= 3. Technical Summary:=0A= - I have executed 3 full git bisect routines on hardware testbenches, is= olating the regression behavior between kernel transitions.=0A= - Recent user reports confirm the same black screen / no EDID handshake = failure upon resume and DPMS display wake-up across multiple Linux distribu= tions (Ubuntu, Fedora, Void Linux) and kernel versions (up to kernel 7.0).= =0A= =0A= Please re-open and maintain active tracking for this regression on Regzbot.= I remain available to test candidate patches, kernel builds, or debug flag= s on physical hardware.=0A= =0A= Best regards,=0A= Danilo Machado=