I decided to upgrade to Bookworm because I needed to use some NVRAM memory supposedly available in my computer, but then my wireless Ethernet started to "complain". I initially thought those errors might be related to the lazy use of the Ethernet drivers from Bullseye but when I started to use Bookworm's drivers the errors became more complicated. Following some hints from:
https://askubuntu.com/questions/863150/pcie-bus-error-severity-corrected-type-physical-layer-id-00e5receiver-id [290569.588458] pcieport 0000:00:1d.0: AER: Multiple Corrected error received: 0000:01:00.0 [290569.588488] r8169 0000:01:00.0: PCIe Bus Error: severity=Corrected, type=Physical Layer, (Receiver ID) [290569.588489] r8169 0000:01:00.0: device [10ec:8136] error status/mask=00000001/00006000 [290569.588491] r8169 0000:01:00.0: [ 0] RxErr (First) I found out it was the Realtek RTL810xE PCI Express Fast Ethernet controller: $ lspci -nn | grep PCIe 00:1d.1 PCI bridge [0604]: Intel Corporation Ice Lake-LP PCIe Port [8086:34b1] (rev 30) $ sudo hwinfo --pci ... 14: PCI 100.0: 0200 Ethernet controller [Created at pci.386] Unique ID: lkKU.j9EpqGNzpV9 Parent ID: 1GTX.j6F4IaHYGk7 SysFS ID: /devices/pci0000:00/0000:00:1d.0/0000:01:00.0 SysFS BusID: 0000:01:00.0 Hardware Class: network Model: "Realtek RTL810xE PCI Express Fast Ethernet controller" Vendor: pci 0x10ec "Realtek Semiconductor Co., Ltd." Device: pci 0x8136 "RTL810xE PCI Express Fast Ethernet controller" SubVendor: pci 0x1028 "Dell" SubDevice: pci 0x097c Revision: 0x07 Driver: "r8169" Driver Modules: "r8169" Device File: enp1s0 I/O Ports: 0x3000-0x3fff (rw) Memory Range: 0x91400000-0x91400fff (rw,non-prefetchable) Memory Range: 0x91200000-0x91203fff (ro,non-prefetchable) IRQ: 16 (2575859 events) HW Address: c0:3e:ba:26:aa:93 Permanent HW Address: c0:3e:ba:26:aa:93 Link detected: no Module Alias: "pci:v000010ECd00008136sv00001028sd0000097Cbc02sc00i00" Driver Info #0: Driver Status: r8169 is active Driver Activation Cmd: "modprobe r8169" Config Status: cfg=new, avail=yes, need=no, active=unknown ... $ $ sudo hwinfo --network 25: None 00.0: 10701 Ethernet [Created at net.126] Unique ID: VV91.ndpeucax6V1 Parent ID: qru8.BzdVZ3YOQjC SysFS ID: /class/net/wlp2s0 SysFS Device Link: /devices/pci0000:00/0000:00:1d.1/0000:02:00.0 Hardware Class: network interface Model: "Ethernet network interface" Driver: "ath10k_pci" Driver Modules: "ath10k_pci" Device File: wlp2s0 HW Address: 5c:3a:45:0a:fb:c1 Permanent HW Address: 5c:3a:45:0a:fb:c1 Link detected: yes Config Status: cfg=new, avail=yes, need=no, active=unknown Attached to: #4 (Ethernet controller) 26: None 00.0: 10700 Loopback [Created at net.126] Unique ID: ZsBS.GQNx7L4uPNA SysFS ID: /class/net/lo Hardware Class: network interface Model: "Loopback network interface" Device File: lo Link detected: yes Config Status: cfg=new, avail=yes, need=no, active=unknown 27: None 00.0: 10701 Ethernet [Created at net.126] Unique ID: QObM.ndpeucax6V1 Parent ID: lkKU.j9EpqGNzpV9 SysFS ID: /class/net/enp1s0 SysFS Device Link: /devices/pci0000:00/0000:00:1d.0/0000:01:00.0 Hardware Class: network interface Model: "Ethernet network interface" Driver: "r8169" Driver Modules: "r8169" Device File: enp1s0 HW Address: c0:3e:ba:26:aa:93 Permanent HW Address: c0:3e:ba:26:aa:93 Link detected: no Config Status: cfg=new, avail=yes, need=no, active=unknown Attached to: #8 (Ethernet controller) $ After using Bookworm drivers I am still getting: [ 9514.141680] pcieport 0000:00:1d.0: AER: Multiple Corrected error received: 0000:01:00.0 [ 9514.141723] r8169 0000:01:00.0: PCIe Bus Error: severity=Corrected, type=Physical Layer, (Receiver ID) [ 9514.141728] r8169 0000:01:00.0: device [10ec:8136] error status/mask=00000001/00006000 [ 9514.141734] r8169 0000:01:00.0: [ 0] RxErr (First) Why would such errors start happening with I tried to use the NVRAM card? Why would that happen? How do you troubleshoot such errors in a more in depth way? lbrtchx