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Tue, 10 Apr 2018 03:38:41 -0400 Received: from mx2.suse.de ([195.135.220.15]:39086 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752181AbeDJHij (ORCPT ); Tue, 10 Apr 2018 03:38:39 -0400 Date: Tue, 10 Apr 2018 09:38:36 +0200 From: Jean Delvare To: Jason Andryuk Cc: Wolfram Sang , benjamin.tissoires@redhat.com, andyrtr@archlinux.org, aduggan@synaptics.com, stable@vger.kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3] i2c: i801: blacklist Host Notify on HP EliteBook G3 850 Message-ID: <20180410093836.1e39d9d8@endymion> In-Reply-To: <20180405183824.13333-1-jandryuk@gmail.com> References: <20180404225643.6b40782f@endymion> <20180405183824.13333-1-jandryuk@gmail.com> Organization: SUSE Linux X-Mailer: Claws Mail 3.13.2 (GTK+ 2.24.31; x86_64-suse-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Thu, 5 Apr 2018 14:38:24 -0400, Jason Andryuk wrote: > The HP EliteBook G3 850 has a weird bug where a subsequent cold boot > hangs while plugged in if Linux enables the Host Notify features of > i2c-i801. The cold boot hang depends on how the system boots. It does > not hang on UEFI Grub text boot or legacy Grub text boot. But it does > hang on legacy Grub graphical boot and Intel Boot Agent PXE text boot. > Booting unplugged is not affected. > > Disabling the Host Notify feature with disable_feature=0x20 works around > the bug, so automatically do so based on DMI information. > > More information can be found here: > https://www.spinics.net/lists/linux-i2c/msg33938.html > > Signed-off-by: Jason Andryuk > Reviewed-by: Jean Delvare > Cc: stable@vger.kernel.org > --- > v3: Switch to DMI_EXACT_MATCH and add empty element to array > > drivers/i2c/busses/i2c-i801.c | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > (...) Wolfram and stable, please hold on with this patch, Jason and I may have found a proper fix so blacklisting would no longer be needed. -- Jean Delvare SUSE L3 Support