From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (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 7B4DC3A6EF4 for ; Mon, 4 May 2026 11:00:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777892406; cv=none; b=HghH+gWiVctyNbTLMgB5cTYnWZa5KxeGBsUVX70vm2Fk9nezM+h++qPR01+r7IBC8ZbeP9CsvUM6vc0DiPZkmBzBmsUcAdjh7kaiT+uq5CvEZSN5awaklzp4fTb7LYDkgTiBwiNWK61KcEkGcPfNK8v3x8Sv4jUiYARcYP6A5Bo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777892406; c=relaxed/simple; bh=OTl8Q/Qtdp18T/CRlBdLAh2ae3LQb5ULXQzgMFALlP0=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=g2ZkKIsE8djIHL6HL4w7xzHvHkcJqgGy+0mIKH9RMjfNq+VjHbd1HnUYzlrwWqvxZ65/N/lYAZGEaZ/uKimOzG7IPvEjZjb2qjOc+d+hCZnOc20QoYbw+r0VHKhV7bhWjMHeh1LQ+N7nkJlyg4noV7xv/AJAHZVpZw3eAQHgDlY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=KRPY/yyx; arc=none smtp.client-ip=198.175.65.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="KRPY/yyx" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1777892406; x=1809428406; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version:content-transfer-encoding; bh=OTl8Q/Qtdp18T/CRlBdLAh2ae3LQb5ULXQzgMFALlP0=; b=KRPY/yyxwlAFa0sChBmQbVf0VegvRV1QQ31hUXbb1ZwhBF0ixNVf8D0s 7JCyQq2QMWJMclLFLKOrDpycJlwPyASDttqll9YNuPVcp5xeTZXsOkfVo 5b0o0El60OeqJFthgoK9TfR0UjMw+7mGkWNRZi2qtBZ2qwTwh7QIIU65h gAGXCOStRBCtqaKMNSVs2uDEv/EQKkSG2/FXKqiAVmIlRTDHifTny9dh3 1M3s60faaM8PbgMyQWF299n3aQThzDSTNNB4zvML+CgIkYE2u4KFnvX9g ITd/Iv5sm93gRIpPqTMCvPdmBuc9bN3jd37YFKezo2Bf4vSPgufa4ybnI w==; X-CSE-ConnectionGUID: RSb0QIIITsOqfSfsEDOJNQ== X-CSE-MsgGUID: OWAWxbAqRZ2c4DSOQs9cbQ== X-IronPort-AV: E=McAfee;i="6800,10657,11775"; a="101412671" X-IronPort-AV: E=Sophos;i="6.23,215,1770624000"; d="scan'208";a="101412671" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 May 2026 04:00:05 -0700 X-CSE-ConnectionGUID: Z2Lr3lhiSei6sDIcLN/7Qw== X-CSE-MsgGUID: CyMiGPUBT3iqDSglE3o08w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,215,1770624000"; d="scan'208";a="232831699" Received: from pgcooper-mobl3.ger.corp.intel.com (HELO localhost) ([10.245.245.157]) by fmviesa008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 May 2026 04:00:02 -0700 From: Jani Nikula To: Andy Shevchenko , Luna Jernberg Cc: Linus Torvalds , Mikael Eriksson , lee@kernel.org, Hans de Goede , "Rafael J. Wysocki" , Greg Kroah-Hartman , Linux Kernel Mailing List Subject: Re: Linux 7.1-rc2 In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs Bertel Jungin Aukio 5, 02600 Espoo, Finland References: Date: Mon, 04 May 2026 13:59:59 +0300 Message-ID: <5b188c1d2a245d1fd139a1262e9c913c7a854ca8@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On Mon, 04 May 2026, Andy Shevchenko wr= ote: > On Mon, May 04, 2026 at 06:52:02AM +0200, Luna Jernberg wrote: >> Hey! >>=20 >> Having the same backlight problem as in rc1 > > I think you can try to find a time and bisect [1] to the problematic comm= it. > Note, using `ccache` (your distro should have that) may speed up a lot the > build process, hence drastically decrease the time needed to find the cul= prit. > Taking into account the amount of changes in the kernel it usually takes = less > than 14 steps (basically amount of how many times you need to build a ker= nel). The bisect is likely the quickest way to root cause this. But if that's too much to ask, please file a bug as described at [1], with the full dmesg attached, with the proper drm.debugs enabled. I've seen [2] but it's not the full dmesg, and it doesn't have the appropriate drm.debugs enabled (it's a bit mask). The replies to Linus' -rc mails give an air of urgency, but there's just not enough actionable information here. There's not going to be a fix in -rc3 either if we don't know what the problem is! BR, Jani. [1] https://drm.pages.freedesktop.org/intel-docs/how-to-file-i915-bugs.html [2] https://lore.kernel.org/r/CADo9pHiFE6fX_XxYWL+0UEqDLsXQYGzfvnFF5NK_NWbv= Msz25Q@mail.gmail.com > >> Den s=C3=B6n 3 maj 2026 kl 23:41 skrev Linus Torvalds >> : >> > >> > I bring you tidings of another regular rc release - 7.1-rc2 is out, >> > and looks fairly normal. >> > >> > Now, the raw diffstat doesn't _look_ normal, with half of the diff >> > being to the kvm selftests, but that's pretty much entirely due to >> > just renaming in the selftests to have the same naming conventions as >> > the kernel code has (wrt both variable and type names), so it all >> > looks big and strange, but you should just ignore that oddity. >> > >> > And when that part is masked out, the rest looks very normal - about >> > half various driver fixes (gpu and networking dominating as usual), >> > with the rest being spread all over the place. >> > >> > It's not small, and while it's a bit early to say for sure, I do >> > suspect we're seeing the same continued pattern of more patches than >> > usual - probably due to AI tooling - that we saw in 7.0. >> > >> > Let's keep testing, > > [1]: > https://docs.kernel.org/admin-guide/bug-bisect.html > https://wiki.ubuntu.com/Kernel/KernelBisection > https://wiki.gentoo.org/wiki/Kernel_git-bisect --=20 Jani Nikula, Intel