DVB adapters may stop to working over time, or work with issues like CC errors and signal re-tuning. These malfunction signs could be reflected as the following error in the dmesg:
pcieport 0000:00:1c.3: PCIe Bus Error: severity=Corrected, type=Physical Laye
Typically, this error occurs as a result of the system's Active-State Power Management (ASPM) attempting to reduce power supply to the PCIe port.
On the servers we recommend to disable power management.
Open file /etc/default/grub in any text editor and find the line started with:
GRUB_CMDLINE_LINUX_DEFAULT=
add the parameter pcie_aspm=off:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=off"
Save the file and apply the changes:
sudo update-grub
Restart your server