okay, here is the data you have been waiting for...
but first thing to know is that I have put my laptop on a stand to
increase airflow, thus it's over-all temperature is now about 3 degrees
cooler than the above observations. none-the-less even with better
airflow it still hit 96c and climbing,
12.04 low latency 64 bit
idle to max load and back to idle
max temp was 79c
** Attachment added: 12.04 temperature and cpu load log
https://bugs.launchpad.net/ubuntu/+source/linux-lowlatency/+bug/1166916/+attachment/3642723/+files/12.04-lowlat-temperature-idle-to-max-to-idle.log
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You
13.04 beta 2 low latency 64 bit
prolonged idle trying to find the lowest possible temperature
this was from before installing updates, but after installing updates I
saw no difference.
** Attachment added: 13.04 beta 2 lowlat -- idle to find lowest temperature
log
13.04 beta 2 low latency 64 bit
idle to max load and back to idle
note: It did not reach it's max peak temperature, I shut down the load
once it reached the 90's
** Attachment added: 13.04 beta 2 lowlat -- idle to max and back to idle -
temperature and cpu log
13.04 beta 2 Generic 64 bit - idle to max to idle - temperature and cpu
log
general impression is that teh generic might be slightly cooler than low
latency, but not a significant difference.
again. once it hit the 90's I shut down the load.
also I did some prolonged idleing at the start
2 further thoughts...
on 12.10 I also tried the 32 bit low latency kernel with similar high
temperatures.
on 13.04 during prolonged idle I noticed an interesting behavior;
when starting from cool... and running at idle, it heats up to 79c at
which point the fan kicks into high gear, it then
ubuntu 10.10 generic 32 bit
here is the data for 10.10, it's actually closer to 12.04 then I thought
it was. The chief difference is that with 12.04 I am always aware of
the fan noise even at idle, but with 10.10 at idle the fan is effectivly
silent.
I had to wait until the computer was cold to
ubuntu 10.10 generic 32 bit
idle to max and then back to idle
note it took several minutes of fumbling around to get a consistant high
load... my usual technique is to open severel virtualboxes and then
have each one play a video, but on this os, I have not used it in so
long that the software
The open-source radeon driver is notorious for overheating laptops.
Unfortunately, you cannot use fglrx/Catalyst on Ubuntu 12.10 or later for that
GPU. Your best best is to stick with 12.04 and use the proprietary
fglrx/Catalyst driver for now.
Another option is using 12.10 and downgrading your
So, I guess you are saying don't buy AMD??? ;-o
on 10.10 the temperature is usually in the mid 50's and seldom hits 70.
also the fan hardly ever comes on.
12.04 is usually in the 60's(c) and under high load hits about 78c, the
fan is on but it's usually quiet.
on 12.10 13.04 the temperature
AMD has a good open-source team that is hamstrung by lepal/IP problems.
They're getting better on that front though. See Phoronix .com forums
for greater support.
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** Attachment added: lshw ps
https://bugs.launchpad.net/ubuntu/+source/linux-lowlatency/+bug/1166916/+attachment/3635250/+files/ps-lshw.txt
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https://bugs.launchpad.net/bugs/1166916
** Attachment added: lm-sensors
https://bugs.launchpad.net/ubuntu/+source/linux-lowlatency/+bug/1166916/+attachment/3635249/+files/output-of-lm-sensors.txt
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the above data is from running on the flash drive, but I also get
similar results from Beta 1 installed with all updates.
also, on 12.10 I got similar results when running the generic kernel.
have not yet tried the generic kernel on 13.04 but would expect it will
behave the same based on
Could you please verify if this happens also on linux-generic. The
kernels are so alike, that it might make more sense to change this bug
as affecting linux-generic instead.
I've seen overheating issues myself for AMD cards on regular Ubuntu.
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