| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <201011041706.59046.maciej.rutecki@gmail.com> Date: Thu, 4 Nov 2010 17:06:58 +0100 From: Maciej Rutecki <maciej.rutecki@...il.com> To: "linux-kernel" <linux-kernel@...r.kernel.org>, linux-acpi@...r.kernel.org, rui.zhang@...el.com, len.brown@...el.com, "Rafael J. Wysocki" <rjw@...k.pl> Subject: [REGRESSION] [2.6.37-rc1] Fan noise after suspend to ram/disk 1. Last known good kernel: 2.6.36 Bad kernel: 2.6.37-rc1 =============================== 2. Problem: When I resume computer from s2ram/s2disk and current CPU temp is below lowest trip point, and -- from unknown reason -- fan start in maximum speed it doesn't turn off (it should). It doesn't happen always but only when fan starts work and any of trip points aren't exceed. It seems that system only check temperature when exceed trip point. =============================== 3. /sys/cass/thermal/ info: I have: maciek@...is:/sys/class/thermal$ ls cooling_device0 cooling_device2 cooling_device4 cooling_device6 thermal_zone1 thermal_zone3 cooling_device1 cooling_device3 cooling_device5 thermal_zone0 thermal_zone2 thermal_zone4 maciek@...is:/sys/class/thermal$ cat cooling_device*/type LCD Processor Processor Fan Fan Fan Fan =============================== Colling device from 3 to 6 are inform what is current fan speed, for example: cooling_device3 = 0 cooling_device4 = 0 cooling_device5 = 0 cooling_device6 = 0 Means that fan is off. cooling_device3 = 0 cooling_device4 = 0 cooling_device5 = 0 cooling_device6 = 1 Means fan works on 40% of full speed (1st trip point is exceed). cooling_device3 = 1 cooling_device4 = 1 cooling_device5 = 1 cooling_device6 = 1 Means fan works on full speed (all (4) trip points is exceed). =============================== 5. State when fan works on full speed after resume: maciek@...is:/sys/class/thermal$ cat cooling_device*/cur_state 0 0 0 1 1 1 1 (Runs on full speed) maciek@...is:/sys/class/thermal$ cat thermal_zone0/trip_point_* 256000 critical 78000 active 70000 active 60000 active 50000 active (It's OK for current CPU temp) "sensors" command shows: maciek@...is:/sys/class/thermal$ sensors acpitz-virtual-0 Adapter: Virtual device temp1: +37.0°C (crit = +256.0°C) temp2: +42.0°C (crit = +90.0°C) temp3: +33.0°C (crit = +105.0°C) temp4: +20.0°C (crit = +90.0°C) temp5: +100.0°C (crit = +110.0°C) "temp1" in this model of HP notebook is only for debug purposes (I think). "temp2" shows CPU temp (fan speed depends on it) "temp5" shows fan speed in % of maximum speed. =============================== 6. I run this command, to "hot" the processor: "while true; do echo -n; done" and cancel it, when I see, that first trip point was exceed, and fan starts working on lower speed. =============================== 7. When it done I saw: maciek@...is:/sys/class/thermal$ cat cooling_device*/cur_state 0 0 0 0 0 0 1 Fan works on 40% of full speed. It's OK. maciek@...is:/sys/class/thermal$ cat thermal_zone0/trip_point_* 256000 critical 78000 active 70000 active 60000 active 45000 active Last trip point was changed from 50000 to 45000 because trip point was exceed (it's OK, fan stops working below 45*C or starts working on 60% speed, above 60*C). "sensors" show: maciek@...is:/sys/class/thermal$ sensors acpitz-virtual-0 Adapter: Virtual device temp1: +50.0°C (crit = +256.0°C) temp2: +48.0°C (crit = +90.0°C) temp3: +34.0°C (crit = +105.0°C) temp4: +20.0°C (crit = +90.0°C) temp5: +40.0°C (crit = +110.0°C) =============================== Dmesg: http://unixy.pl/maciek/download/kernel/2.6.37-rc1/gumis/dmesg-2.6.37-rc1.txt acpidump: http://unixy.pl/maciek/download/kernel/2.6.37-rc1/gumis/acpidump.dat Config: http://unixy.pl/maciek/download/kernel/2.6.37-rc1/gumis/config-2.6.37-rc1 Regards -- Maciej Rutecki http://www.maciek.unixy.pl -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists