01-23-2012 02:34 AM
There is something more I've noticed about cooling system working on manually switched integrated graphics.
When I restart system having this kind of graphics switched on, the fan after restart still works at constant, moderate speed, doesn't stop and throttle up. All the time keeps working and it is not necessary, because the system is cool. And then when I switch to discrete, it stops, and then sometimes starts for a second or if needed for longer, which is desired, proper work of the fan. When I go back to integrated, without restarting, then the situation desribed earlier takes place - no work of the fan at all. So, to sum up: cooling system on integrated graphics switch on manually works wrong - either still or not at all.
01-23-2012 04:19 AM - edited 03-05-2012 02:38 PM
Yes, we know that fan with integrated graphic work wrong and with discrete OK when you switch tha graphics manualy. Read the topic.
Hello, I have been writing in this topic for some time and I exactly know the problem.Maybe You read the topic.
I just want to make sure that Lenovo staff have the most info I can provide so I add everything I notice and make sure Lenovo doesn't question the issue.
01-23-2012 04:21 AM - edited 01-23-2012 04:23 AM
Also when you switch to integrated graphic and fan work on full, then the fan still run on full speed...
Problem is, that this look on problem of AMD not Lenovo :/
02-10-2012 01:44 AM
Me too! But i have experienced this oon both linux and windows. I hope this issue gets resolved quickly, because it limits your work. Even if the issue is AMD/ATI's fault I think lenovo sould take care of fixing or reporting to ATI in order to get this fixed ASAP!
03-05-2012 02:34 PM
Hello all. I'd like to jump into the discussion and confirm this problem exists on my newly purchased e420 as well.
The issue has been explianed pretty well so far, so I'm going to keep it short:
The issue arises with the "Select the graphics processor manually or based on power source" option selected, when the integrated GPU is active (either the laptop's on battery or the the GPU is manually selected while plugged in).
FAN SPEED DOES NOT CHANGE.
I have the latest drivers and latest bios.
Well that wasn't quite short, but I hope it's useful. Hope the issue is resolved as quick as possible.
04-09-2012 06:47 AM
Still no word about a fix? It's been a while...
I'd really like to use the "select graphics processor based on power source" feature. I'm often connected to an 1080 external display and plugged in, so it could use a bit of help from the dedicated card. But if i leave thisd feature on, I'm afraid I'll forget to switch before unplugging for battery use (the moment when the integrated one kicks in and the fans stop working properly) -- and this can easily damage the laptop!
Any progress? Cleo, are you still tracking this issue in James' place? Some feedback would be appreciated.
04-09-2012 07:56 AM - edited 04-09-2012 07:57 AM
I would like this issue to be solved as well, but what can we do ?? It seems nobody from manufacturer side cares about this anymore so I've lost any hope some time ago...
04-09-2012 10:15 AM