From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5BA61212548 for ; Sat, 23 Aug 2025 18:55:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755975352; cv=none; b=pbCDoc4ClVIvXFMsBqQO7Zx5t7Z9p+bM1m5SuJYv5C2XASwSywuB5tNVH6tPCj7GVthurt8QLDPYr3EqYzq5n9ptRqfpTPu8InWYzbzDxs8FlrAvheEvzoxSrtVzkMAt3xEf0W5TSB57sN5FJqwVqrL2Tijo+9L4C24xJTYSHcE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755975352; c=relaxed/simple; bh=8eulljiyeoquLaspUOsHQlWhKsNF9Cqrkk7X9liSU9A=; h=From:To:Subject:Date:Message-ID:Content-Type:MIME-Version; b=X5tbw1e4Uc7Y7VLn0kTowB4+d/mKDfl6bZwS+TgTUqzSGCrNcNEJJI95A5CiRIoL01Yagx4oPGxw+dmacbURwnaaRy1oI1xM4071ZDZ6BulZpBzQ+nqHkziz5Y1hRiPyerigq8OYVuYVGEoMaV4uGp8BnkTeANOJjQLG3veNFnM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=vDhd/Q3p; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="vDhd/Q3p" Received: by smtp.kernel.org (Postfix) with ESMTPS id E4428C4CEE7 for ; Sat, 23 Aug 2025 18:55:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755975351; bh=8eulljiyeoquLaspUOsHQlWhKsNF9Cqrkk7X9liSU9A=; h=From:To:Subject:Date:From; b=vDhd/Q3pFWl0hwps1IlQp8dCep4BaJc1TKBYk/G/us/g9RI0k0dqE3eHpmsTpvQGF uHDveIslOmwuFgOJcnHSE65LwxaZukjsz3k6vGXw1CA5OmW2zLwXbXsXRufj7lZfTE TMcDtZCCJpKhv7BIBVSuP+zJ+mJ5QEwnk1k8Zhm62s0LfCCGEbbnEixz7qCLh64qDB jVQDapuhHeihnhTrxZyitWY7S+m3N1mid4q5CtngK+36v6WAp3ouExk7wcRlDr8xlO zRPbdl7Fqx/seAZPWpCMFeWDTXTW/fvlsceTX8v/TaxNM+r2xNR8k8oHXn/LfLY/S/ 2yFePYTCDhpBw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id D42A1C3279F; Sat, 23 Aug 2025 18:55:51 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 220486] New: External monitor switches to lower refresh rate after resume from suspend Date: Sat, 23 Aug 2025 18:55:51 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: bghome@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter cf_regression attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D220486 Bug ID: 220486 Summary: External monitor switches to lower refresh rate after resume from suspend Product: Drivers Version: 2.5 Hardware: Intel OS: Linux Status: NEW Severity: normal Priority: P3 Component: USB Assignee: drivers_usb@kernel-bugs.kernel.org Reporter: bghome@gmail.com Regression: No Created attachment 308541 --> https://bugzilla.kernel.org/attachment.cgi?id=3D308541&action=3Dedit Kernel warning from drivers/usb/typec/class.c An external monitor is connected to my laptop via USB-C port. Normally it w= orks in 3840x2160@30Hz mode. Sometimes after resuming from suspend, it falls bac= k to 2048x1080@24Hz mode which is the highest available setting. This can be fix= ed by re-plugging the USB-C cable or reboot. At the same time I see a kernel warning raised by the USB driver (see attac= hed log). Kernel version: LTS 6.12.41 --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=