http://bugzilla.novell.com/show_bug.cgi?id=555556 --- Comment #2 from Pablo Sanchez 2009-11-16 17:13:57 UTC --- Created an attachment (id=327728) acpidump - stock openSUSE 11.2 kernel -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

http://bugzilla.novell.com/show_bug.cgi?id=555556 --- Comment #4 from Pablo Sanchez 2009-11-16 17:16:16 UTC --- Created an attachment (id=327731) diff -u of .config between stock and MCE unset -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

http://bugzilla.novell.com/show_bug.cgi?id=555556#c6 Thomas Renninger changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P5 - None |P2 - High Status|NEW |ASSIGNED --- Comment #6 from Thomas Renninger 2009-11-18 10:53:23 UTC --- This is really strange. I doubt that this is related to MCE. Have you seen any MCEs logged in /var/log/mcelog? Have you really recompiled and tested two kernels one with with MCE set and the other no MCE configs set and you see this difference? Be sure to do the diff after compilation. If configs have dependencies and you recompile, the dependencies might get adjusted automatically. E.g. you could do "make menuconfig" or alter configs manually in .config, then you do: make , .config might get changed behind your back. The fan is not controlled by ACPI. There are two new dell drivers: dell-laptop and dell-wmi. While these should not touch fan control, it would be interesting to know whether one of them gets loaded and whether not loading it helps (do not only rmmod, but make sure it never gets loaded during a boot). Test whether they got loaded: lsmod |grep -i dell Make sure it never gets loaded, add in /etc/modprobe.conf.local: blacklist dell-laptop blacklist dell-wmi -> reboot -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

http://bugzilla.novell.com/show_bug.cgi?id=555556 http://bugzilla.novell.com/show_bug.cgi?id=555556#c7 Pablo Sanchez changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |ASSIGNED Info Provider|pablo@blueoakdb.com | --- Comment #7 from Pablo Sanchez 2009-11-19 16:47:51 UTC --- Hi Thomas, I've spent so much time on this particular issue to try to make heads or tails. Your information led me to suspect the data I was processing. The bottom line is I do not believe there's an issue. I'll close out this bug. For entertainment purposes, let me elaborate on what I found. First, I did compile a different kernel. I made an error initially where I didn't change CONFIG_LOCALVERSION. Once I corrected it, I confirmed I was using the freshly minted `/lib/modules' My subsequent tests were between an MCE-disabled kernel and an MCE-enabled kernel. I downloaded and (trivial) compiled `dellfand' Although it reports temperature, I decided to not use its value and only used the fan-speed it was reporting. Next, I wrote a shell script (`mon') which called `dellfand' every two seconds and also collated data from `sensors' and `/proc/acpi/thermal_zone/THM/temperature' As a side note, initially, when I submitted the bug, I was using `gkrellm', configured to use `sensors' data. During one test, I pulled out my can of `dust-off' (not to inhale!) to expedite the cooling of the cores between benchmark runs. Once I did this, I noticed the machine ran far far cooler than before. Ha! While running my `mon', I ran my `compile test' What I noticed was the the data reported by `sensors' could vary either higher or lower than what is reported by `/proc/acpi/...' I surmised that the kernel is using data from `/proc/acpi/...' because .. well, it's always there. :) I suspect `lm_sensors' is not providing the correct data. Or `/proc/acpi/...' is incorrect. Or perhaps both are incorrect. After cleaning my fans, I wasn't able to get the fans to come on `high' The core temperatures never reached 80C and above. I also noted saved and compared the data from `mon' between runs. To bring the above together, I believe the issues were/are: o My fans needed cleaning. o `sensors' and `/proc/acpi/*' do not agree on temperature. o My apologies for submitting a Severity 1 bug and wasting your time. Sorry. Cheers, -pablo -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

http://bugzilla.novell.com/show_bug.cgi?id=555556 http://bugzilla.novell.com/show_bug.cgi?id=555556#c9 --- Comment #9 from Jean Delvare 2009-11-19 17:20:17 UTC --- Pablo, thanks a lot for clarifying the situation. -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.