Jeff Geerling

@mpsparrow Thank you so much for the help and patience, and detailed explanations :) I didn't realize the 13.0.x series had a match to the driver in use, so I'll...

@mpsparrow Thanks! I have it working (been updating the comment above, also added instructions in my blog post for quicker reference). However, when running `nvbandwidth`, I am not getting a...

Ah... the 4070 Ti might just not be 'Pro' enough: ``` jgeerling@cm5:~/Downloads/nvbandwidth $ nvidia-smi topo -p2p r GPU0 GPU1 GPU0 X NS GPU1 NS X Legend: X = Self OK...

@mpsparrow - That works: ``` memcpy CE CPU(row)

Over in https://github.com/geerlingguy/ai-benchmarks/issues/44 I found that it looks like the switch as configured by Dolphin already had ACS disabled... ``` jgeerling@cm5:~ $ sudo lspci -vv | grep -E 'ACSCap|ACSCtl' ACSCap:...

@mpsparrow - Regarding boot enumeration, I sometimes have one device (when I'm running multiple) just not show up at all (with no obvious errors in `dmesg`), and I'm wondering if...

@mpsparrow - I've opened up https://github.com/raspberrypi/linux/issues/7172 — we'll see if there's any other way of debugging further.

@mpsparrow - https://github.com/raspberrypi/linux/issues/7172#issuecomment-3642841178 @P33M suggested testing out `dtparam=pcie_tperst_clk_ms=250` in `/boot/firmware/config.txt` (if that's helpful for the switch chip...) ``` $ dtparam -h pcie_tperst_clk_ms pcie_tperst_clk_ms Add N milliseconds between PCIe reference clock...

@mpsparrow Oh awesome! I will have to put this in my toolbelt too, when I'm having enumeration issues. I might throw the 3060 back on the switch and see if...

@mpsparrow - Hmm, now I can't replicate my enumeration failure anymore. Not sure why: ``` jgeerling@cm5:~ $ nvidia-smi Thu Dec 11 16:59:21 2025 +-----------------------------------------------------------------------------------------+ | NVIDIA-SMI 580.95.05 Driver Version: 580.95.05...