From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: Re: [regression] nct6775 does not load in 5.4 and 5.5, bisected to b84398d6d7f90080 Date: Sat, 22 Feb 2020 12:51:11 +0100 Message-ID: <20200222115111.GD1716@kunai> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="WChQLJJJfbwij+9x" Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-hwmon-owner@vger.kernel.org To: Martin Volf Cc: Mika Westerberg , Jean Delvare , Guenter Roeck , linux-i2c@vger.kernel.org, linux-hwmon@vger.kernel.org, Linux Kernel Mailing List List-Id: linux-i2c@vger.kernel.org --WChQLJJJfbwij+9x Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Martin, On Sat, Feb 22, 2020 at 12:13:07PM +0100, Martin Volf wrote: > Hello, >=20 > hardware monitoring sensors NCT6796D on my Asus PRIME Z390M-PLUS > motherboard with Intel i7-9700 CPU don't work with 5.4 and newer linux > kernels, the driver nct6775 does not load. >=20 > It is working OK in version 5.3. I have used almost all released stable > versions from 5.3.8 to 5.3.16; I didn't try older kernels. >=20 > Even on new kernels the sensors-detect finds the sensors: > Found `Nuvoton NCT6796D Super IO Sensors' Success! > (address 0x290, driver `nct6775') > but "modprobe nct6775" says: > ERROR: could not insert 'nct6775': No such device > There is nothing interesting in dmesg. >=20 > git bisect found out the first bad commit is > b84398d6d7f900805662b1619223fd644d862d7c, > i2c: i801: Use iTCO version 6 in Cannon Lake PCH and beyond >=20 > Unfortunately I am not able to revert it in v5.4 to confirm it is really > the culprit. >=20 > Is there a way to have working hwmon sensors on my system in newer linux > kernels? Well, it worked before, so I am quite sure it can be fixed. Thank you very much for your detailed regression report! Sadly, I am not familiar enough with those drivers, but you put the right people on CC, so I think you will get more feedback within the next days. I'll keep an eye on this, too. Happy hacking, Wolfram >=20 > Thanks, >=20 > Martin >=20 > --8<-- > lspci > 00:00.0 Host bridge: Intel Corporation 8th Gen Core 8-core Desktop > Processor Host Bridge/DRAM Registers [Coffee Lake S] (rev 0d) > 00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 630 > (Desktop 9 Series) (rev 02) > 00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI > Host Controller (rev 10) > 00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10) > 00:16.0 Communication controller: Intel Corporation Cannon Lake PCH > HECI Controller (rev 10) > 00:17.0 SATA controller: Intel Corporation Cannon Lake PCH SATA AHCI > Controller (rev 10) > 00:1b.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root > Port #17 (rev f0) > 00:1c.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root > Port #1 (rev f0) > 00:1c.6 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root > Port #7 (rev f0) > 00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root > Port #9 (rev f0) > 00:1f.0 ISA bridge: Intel Corporation Z390 Chipset LPC/eSPI Controller (r= ev 10) > 00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10) > 00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10) > 00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake > PCH SPI Controller (rev 10) > 00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7) > I219-V (rev 10) --WChQLJJJfbwij+9x Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAl5RFa8ACgkQFA3kzBSg KbbkDw/8D/PpB5Muukf4L8rPt0Q0BAL/ZO7cmlwGKXUxZgm2f3KaqDqSYqrHFQs1 ACTDyyyg6q1RMNiHZQ6LMCBLvWHfgjtBeJcDhTgzFcA7CV+xDrpOan8+8mBHnd8X q/vGIGXoBUREZqiGDkCkWu1Pty3nmbsdNgKXy0fc0Ej8q5Apr8dUJ+VU4r7ZzOt4 naHsYdb3oxyYIu7pNYIM1j64wfivCP6T5pnlfP3JdQkOZfL0dQuW0g3NTcr5n3Gg aEdazPNQuN9HB4KH+wqaztxC9LqlCd++gVFx43rakydhVjVnh6BrYIGKkZoAhr4f OyvPvyF2QWit0tr2UA5u4OIQUS3kzjW8FzvezozsVRjW/5qmDj2xZ/hesvK5oG+S K6uMhABJd8bbBH6Z4/0v/kVgpe0WzMb7qrW125SygYqqckm4WvQ7CprgBIEMXUSg 7wzYbTU+f8bdT0XD/neK0YueQmutM+smcStwCAGtRPtDgfeCS6OBlfyoJTt22pYT Wmaat8iCnX0T2nGXbevLgAI9IE7cbQdvRWCowpBTmQ9So7d9FtI2xhrGbn8xevhs tycC0knPDkLmpM6NTibte5PkfIhJLcSEWp3NLzXoqCrFJMV2UoN4eQ2fvnFlvM2E Q07PfpWT2mnpl7SGY7EItIIXdeJ/4aDfqr2GemEqnSJao27gUvs= =lEKr -----END PGP SIGNATURE----- --WChQLJJJfbwij+9x--