I recently got a new Dell Optiplex 7090 Machine, i9- 10900, 64GB Ram
I attempted to install Ubuntu 20.04 (Server, not using GUI so only using the server version) on it but after the first screen where you select install Ubuntu the display goes blank/loses signal. I assume the hardware is too new for 20.04.
I installed 20.10 (or maybe it was 21.04) and it installed fine, no issues, smooth as expected. However after doing basic setup on it for 15mins or so my SSH connection became slow/got dropped. Investigating I noticed heavy packet loss - it looked like an IP Conflict on the network. I checked & changed IP but no difference.
It's using onboard Gbit LAN plugged direct into the router.
I swapped the network cable with my other PC next to it that had no issue (this meant it was also using a different port on the router as well).
I tried setting a static IP
I tried reinstalling from scratch, tried different versions of Ubuntu 20.04/21.04/21.10(where i am on now).
I tried CentOS 8 - this worked fine, no network packet loss, but I prefer to use Ubuntu so want to get it working.
In the end i figured out that if I plug in a certain USB Memory stick into the front USB3 port the packet loss stops and the network connection becomes stable. Now if I were you I wouldn't believe me either, but I promise you this makes the network connection stable. I can't for the life of me figure out how this could make any difference. But this has persisted across different re-installations. I install Ubuntu from the USB thumb drive, i remove it, I use it for 15mins or so and then packet loss starts happening. I then plug in the USB drive and it's now 100% stable (including pinging overnight).
So I'm at a loss, would love to figure this out if anyone has any ideas/tips to try?
lspci -v
00:00.0 Host bridge: Intel Corporation Device 9b33 (rev 05)
Subsystem: Dell Device 0a52
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: skl_uncore
00:02.0 VGA compatible controller: Intel Corporation CometLake-S GT2 [UHD Graphics 630] (rev 05) (prog-if 00 [VGA controller])
Subsystem: Dell CometLake-S GT2 [UHD Graphics 630]
Flags: bus master, fast devsel, latency 0, IRQ 148
Memory at 6000000000 (64-bit, non-prefetchable) [size=16M]
Memory at 4000000000 (64-bit, prefetchable) [size=256M]
I/O ports at 3000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
00:14.0 USB controller: Intel Corporation Tiger Lake-H USB 3.2 Gen 2x1 xHCI Host Controller (rev 11) (prog-if 30 [XHCI])
Subsystem: Dell Tiger Lake-H USB 3.2 Gen 2x1 xHCI Host Controller
Flags: bus master, medium devsel, latency 0, IRQ 125
Memory at 6001100000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
00:14.2 RAM memory: Intel Corporation Tiger Lake-H Shared SRAM (rev 11)
Subsystem: Dell Tiger Lake-H Shared SRAM
Flags: fast devsel
Memory at 6001114000 (64-bit, non-prefetchable) [disabled] [size=16K]
Memory at 600111b000 (64-bit, non-prefetchable) [disabled] [size=4K]
Capabilities: <access denied>
00:15.0 Serial bus controller [0c80]: Intel Corporation Tiger Lake-H Serial IO I2C Controller #0 (rev 11)
Subsystem: Dell Tiger Lake-H Serial IO I2C Controller
Flags: bus master, fast devsel, latency 0, IRQ 27
Memory at 4010000000 (64-bit, non-prefetchable) [virtual] [size=4K]
Capabilities: <access denied>
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:16.0 Communication controller: Intel Corporation Tiger Lake-H Management Engine Interface (rev 11)
Subsystem: Dell Tiger Lake-H Management Engine Interface
Flags: bus master, fast devsel, latency 0, IRQ 149
Memory at 6001119000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: mei_me
Kernel modules: mei_me
00:17.0 SATA controller: Intel Corporation Device 43d2 (rev 11) (prog-if 01 [AHCI 1.0])
Subsystem: Dell Device 0a52
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 127
Memory at 6e920000 (32-bit, non-prefetchable) [size=8K]
Memory at 6e924000 (32-bit, non-prefetchable) [size=256]
I/O ports at 3080 [size=8]
I/O ports at 3088 [size=4]
I/O ports at 3060 [size=32]
Memory at 6e923000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
Kernel modules: ahci
00:1b.0 PCI bridge: Intel Corporation Device 43c4 (rev 11) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 122
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: 6e800000-6e8fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.0 PCI bridge: Intel Corporation Device 43bd (rev 11) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 123
Bus: primary=00, secondary=02, subordinate=03, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: [disabled]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1f.0 ISA bridge: Intel Corporation Device 4384 (rev 11)
Subsystem: Dell Device 0a52
Flags: bus master, fast devsel, latency 0
00:1f.3 Audio device: Intel Corporation Device f0c8 (rev 11)
Subsystem: Dell Device 0a52
Flags: bus master, fast devsel, latency 64, IRQ 150
Memory at 6001110000 (64-bit, non-prefetchable) [size=16K]
Memory at 6001000000 (64-bit, non-prefetchable) [size=1M]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1f.4 SMBus: Intel Corporation Tiger Lake-H SMBus Controller (rev 11)
Subsystem: Dell Tiger Lake-H SMBus Controller
Flags: medium devsel, IRQ 16
Memory at 6001118000 (64-bit, non-prefetchable) [size=256]
I/O ports at efa0 [size=32]
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801
00:1f.5 Serial bus controller [0c80]: Intel Corporation Tiger Lake-H SPI Controller (rev 11)
Subsystem: Dell Tiger Lake-H SPI Controller
Flags: fast devsel
Memory at 6e922000 (32-bit, non-prefetchable) [size=4K]
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (14) I219-LM (rev 11)
Subsystem: Dell Ethernet Connection (14) I219-LM
Flags: bus master, fast devsel, latency 0, IRQ 124
Memory at 6e900000 (32-bit, non-prefetchable) [size=128K]
Capabilities: <access denied>
Kernel driver in use: e1000e
Kernel modules: e1000e
01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller PM9A1/980PRO (prog-if 02 [NVM Express])
Subsystem: Samsung Electronics Co Ltd NVMe SSD Controller PM9A1/980PRO
Flags: bus master, fast devsel, latency 0, IRQ 16, NUMA node 0
Memory at 6e800000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: nvme
Kernel modules: nvme
02:00.0 PCI bridge: Texas Instruments XIO2001 PCI Express-to-PCI Bridge (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=02, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: [disabled]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
