Hi, I recently upgraded a machine that backs up data at a club from a 2.6.30 based distribution to 4.8.0 based distribution, and I find that modprobing the it87 sensor driver on 4.8.0 causes the machine to lockup. Unfortunately, as far as I'm aware, there is no kernel oops or kernel messages, it just locks the machine up such that it requires a power cycle. With 2.6.30, it was possible to modprobe the driver and lm_sensors would then read out the fan and temperature information (which is necessary to monitor the head-less machine that is otherwise buried in an area that hardly anyone goes.) it87-isa-0290 Adapter: ISA adapter in0: +1.60 V (min = +0.00 V, max = +4.08 V) in1: +2.50 V (min = +0.00 V, max = +4.08 V) in2: +3.34 V (min = +0.00 V, max = +4.08 V) in3: +2.29 V (min = +0.00 V, max = +4.08 V) in4: +3.14 V (min = +0.00 V, max = +4.08 V) in5: +2.72 V (min = +0.00 V, max = +4.08 V) in6: +2.11 V (min = +0.00 V, max = +4.08 V) in7: +2.10 V (min = +0.00 V, max = +4.08 V) Vbat: +0.00 V fan1: 3245 RPM (min = 0 RPM, div = 8) fan2: 0 RPM (min = 0 RPM, div = 8) temp1: +9.0 C (low = +127.0 C, high = +127.0 C) sensor = thermistor temp2: +5.0 C (low = +127.0 C, high = +127.0 C) sensor = thermistor temp3: +27.0 C (low = +127.0 C, high = +127.0 C) sensor = thermal diode Looking at the changes between the two kernels, I'd imagine that unconditionally touching the registers at 0x4e/0x4f (which the driver never used to do) is upsetting the bridges, causing the machine to lock up. Unfortuantely, I'm unable to "play" with the machine, as my only access to it is remotely, and locking the machine up at this stage would mean (a) that it's no longer able to do its job, and (b) it would require visiting the machine physically to power cycle it. Obviously, bisecting over such a large range of kernels is also out as that would require causing the machine to lockup in order to test failure, something I can't risk remotely. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-hwmon" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
