Hello,
Nvidia GT 650M 2GB DDR3 on bumblebee
since last nvidia driver update (from nvidia-364.19 to 367.27), i observed a problem related to the nvidia clock frequencies.
On the previous driver, the card would never surpass 835Mhz when nvidia-settings reports: “battery”. This decreases my laptop’s temperature a LOT while gaming and i used this workaround in order to decrease temps. (from 90C max to ~82C)
After the recent nvidia driver update, my card reaches 950Mhz no matter if on battery or not, which makes my laptop overheat.I want to keep my card on 835Mhz max frequency.
What happens with driver 364.19 and is expected:
- fresh boot to KDE on AC power, nvidia card is OFF (verified through cat /proc/acpi/bbswitch)
- unplug computer
or alternatively: - fresh boot on battery, nvidia card OFF
then:
- open nvidia-settings. nvidia-settings reports “Power Source: battery”
- nvidia card doesnt surpass 835Mhz while gaming
What happens with 367.27:
- fresh boot to KDE on AC power, nvidia card is OFF (verified through cat /proc/acpi/bbswitch)
- unplug computer
or alternatively: - fresh boot on battery, nvidia card OFF
then:
- open nvidia-settings. nvidia-settings reports “Power Source: battery”
- nvidia card overclocks at 950Mhz while gaming.
Powermizer modes:
0: 135-405Mhz , 810Mhz
1: 135-950Mhz , 1800Mhz
Please let me know if you need any more info. I hope this issue is resolved ASAP.
Thanks for your help in advance.
here is nvidia-bug-report.gz Dropbox - nvidia-bug-report.log.gz - Simplify your life
EDIT i should also note that nvidia-340 has the expected behaviour of 835Mhz
EDIT2 clarified reproduction steps
EDIT3 added “sudo dmidecode” output
SAMSUNG NP550P5C-S02GR
Intel Core i5-3210M+Intel HD 4000
Geforce GT 650M 2GB DDR3
8GB ram
1TB 5400rpm disk
nvidia-bug-report.log.gz (172 KB)
dmidecode_output.txt (23.4 KB)
nvidia-bug-report.log.gz (70.8 KB)
nvidia-bug-report.log.gz (195 KB)
nvidia_364_output.txt (3.86 KB)
nvidia_375_output.txt (2.56 KB)
nvidia_settings_output.txt (25.1 KB)