Lemur (lemu2) Fan Speed Doesn't Throttle
Bug #640842 reported by
Thomas Aaron
This bug affects 2 people
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
System76 |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
The fan on the Lemur 2 (LemU2) doesn't throttle.
Probably affecting battery life as well.
Determined to be a BIOS issue. Confirmed by in-house testing.
Changed in system76: | |
status: | New → In Progress |
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Instructions for flashing the BIOS in the LemU2 to improve fan throttling.
You will need two USB flash drives for this procedure.
1. Make sure your Lemur is connected to AC power.
2. Download the freedos image from the post below this one. Click the Save button. The file will be saved in your Downloads folder.
3. Create a bootable FreeDOS flash drive...
* Open a terminal and run the following command...
tail -f /var/log/syslog
* Insert USB pen drive #1.
* In the terminal, syslog will give you the /dev/* path of your USB pen drive. Record it. It will probably be /dev/sdb1. It is of the utmost importance that you record this path correctly.
* Now press Ctrl-C to return you to a command prompt.
* Now run this command in the terminal...
cd Downloads
* READ THIS ENTIRE STEP BEFORE PROCEEDING Sys76_BootImage of=/dev/sdb bs=1M Sys76_BootImage of=<your usb path minus the number> bs=1M
In a terminal, type:
dd if=~/Downloads/
NOTICE that I omitted the number from the USB path (i.e. /dev/sdb instead of /dev/sdb1). ALSO, if you recorded something other than /dev/sdb in step #3, you should substitute your recorded path (minus the number) for /dev/sdb. In other words, type:
dd if=~/Desktop/
* Right-click on the USB pen drive icon on your desktop and select EJECT or UNMOUNT.
4. Install Firmware Files on a Second Flash Drive...
* Download the firmware files from two posts down... below the post with the FreeDOS image.
* Insert a second USB Flash Drive.
* Unzip the firmware file into the second USB flash drive.
5. Flash your firmware...
* With both USB flash drives plugged into your computer, reboot and boot into the FreeDOS drive. To do this, press F1 during the Sytsem76 splash page to enter a boot menu and then select your FreeDOS drive. If this doesn't work, you may need to Press F2 during the System76 splash page to enter the BIOS Setup Utility and set "USB Device" as the first boot device in the boot order. If you need assistance with this, please do not hesitate to call System76 technical support.
* Once you've booted into the FreeDOS flash drive, please run the following commands one at a time, pressing enter after each one.
c:
f.bat
Once the firmware has been flashed, reboot your machine.
Please contact System76 support with any questions. When flashing firmware, it's better to be safe than sorry.