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I bought one SER7 7840HS in 2023. It works great and uses BIOS version SER7PRO_P5C8V28 with release date 08/14/2023.
I bought two more in March 2024 and both use BIOS version SER7PRO_P5C8V38 with BIOS version 1/10/2024.
I use Ubuntu 22.04 with an HWE kernel which is currently 6.5.0-27-generic.
On each of them I installed a Samsung 980 Pro device in the second m.2 slot. This worked fine on the older one with BIOS version SER7PRO_P5C8V28. But on the new ones with BIOS version SER7PRO_P5C8V38 there are a large number of correctable PCI errors reported in /var/log/syslog. The frequency of errors made boot slow, I have no idea whether it is bad for performance and I don't want that much spam in syslog.
The errors only occur when there is an m.2 device in the second slot and they occur with Gen3 PCI devices (Samsung 970 EVI) and Gen4 (Samsung 980 Pro, Crucial T500).
Perhaps a different version of the BIOS would fix the problem but it doesn't look like BIOS versions are available to download.
After searching Google for hours, something that made the errors go away was to add this to /etc/default/grub to disable ASPM (Active State Power Management).
GRUB_CMDLINE_LINUX_DEFAULT="pcie_aspm=off"
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Post time 2024-04-19 02:45:34
Post time 2024-04-19 17:16:30
Author
