我最近更换了笔记本电脑风扇，现在一切正常，虽然在 Ubuntu 中速度似乎很慢。现在我认为在更新系统后（不确定），风扇似乎不工作了。
$sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +76.0°C (crit = +127.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +76.0°C (high = +80.0°C, crit = +90.0°C)
Core 2: +77.0°C (high = +80.0°C, crit = +90.0°C)
我如何检查是否存在硬件问题？
如果没有，我该如何解决？
如果我能得到一步步的指导来分析问题并找到解决方案，我将不胜感激。
因此ftws fan，感谢@Lnux：
$ fwts fan
Running 1 tests, results appended to results.log
Test: Simple Fan Tests.
Check fan status. 5 passed
Load system, check CPU fan status.
正如给出的我如何知道我的风扇在 Ubuntu 中是否正常工作：
sudo apt-get install hardinfo
在 中System Profiler and Benchmark，我看到选项中有一个空白页sensor。
迄今为止尝试的步骤：
作为给予Ubuntu 14.04 下的 Fancontrol – 解析 /usr/sbin/pwmconfig：没有安装支持 pwm 的传感器模块，
sudo gedit /etc/default/grub
替换：
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_enforce_resources=lax"
更新启动配置：
sudo update-grub
sudo pwmconfig
得出：
$ sudo pwmconfig
# pwmconfig revision 5857 (2010-08-22)
This program will search your sensors for pulse width modulation (pwm)
controls, and test each one to see if it controls a fan on
your motherboard. Note that many motherboards do not have pwm
circuitry installed, even if your sensor chip supports pwm.
We will attempt to briefly stop each fan using the pwm controls.
The program will attempt to restore each fan to full speed
after testing. However, it is ** very important ** that you
physically verify that the fans have been to full speed
after the program has completed.
/usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed
系统详细信息：
Ubuntu 12.04 LTS 64 bit
Lenovo Ideapad z560
输出lspci -k | grep -EA2 'VGA|3D'：
$ lspci -k | grep -EA2 'VGA|3D'
01:00.0 VGA compatible controller: NVIDIA Corporation GT218M [GeForce 310M] (rev a2)
Subsystem: Lenovo Device 392d
Kernel driver in use: nvidia
输出dpkg -l | grep nvidia：
$ dpkg -l | grep nvidia
ii nvidia-331 340.96-0ubuntu0.12.04.1 Transitional package for nvidia-331
ii nvidia-340 340.96-0ubuntu0.12.04.1 NVIDIA binary driver - version 340.96
ii nvidia-340-uvm 340.96-0ubuntu0.12.04.1 Transitional package for nvidia-340
ii nvidia-common 1:0.2.44.2 Find obsolete NVIDIA drivers
ii nvidia-libopencl1-340 340.96-0ubuntu0.12.04.1 NVIDIA OpenCL Driver and ICD Loader library
ii nvidia-opencl-icd-340 340.96-0ubuntu0.12.04.1 NVIDIA OpenCL ICD
ii nvidia-prime 0.5~hybrid0.0.3 Tools to enable NVIDIA's Prime
ii nvidia-settings 331.20-0ubuntu0.0.1 Tool for configuring the NVIDIA graphics driver