Hello,

  I use Dell Precision 3530 with NVIDIA Corporation GP107GLM [Quadro P600
Mobile] (rev a1). I use Fedora Core 28 with 4.17.6 x86_64 kernel.
  I found that sensors tool shows wrong temperature:

$ sensors
nouveau-pci-0100
Adapter: PCI adapter
temp1:       +511.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +105.0°C, hyst =  +5.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)

  Temperature is obviously wrong.
  I tried to troubleshoot it on sensors side and it looks that sensors tool
receives this wrong value from driver.
  I made one more observation - right after suspend/wakeup the value is
completely different:

$ sensors
nouveau-pci-0100
Adapter: PCI adapter
temp1:       +511.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +105.0°C, hyst =  +5.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)

$ sensors
nouveau-pci-0100
Adapter: PCI adapter
temp1:        +43.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +105.0°C, hyst =  +5.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)

$ sensors
nouveau-pci-0100
Adapter: PCI adapter
temp1:       +511.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +105.0°C, hyst =  +5.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)

  I can provide more information when required.