I have 3.5A PS and I can have the same. Mouse, 100 mA, backlit keyboard 500 mA, low power USB SSD 400 mA and the next item is probably 200 mA or more and that is max.
I have a powered USB 3.0 hub, and even though it is powered, it draws power. If I plug it in, I can get the exact same warning message… even if I move both the mouse and keyboard to the powered hub. So just the SSD and powered hub are plugged in the two USB 3 ports, and I can get the message. I can not say exactly why, seems it should not be the case… but it is.
And with the power, mouse and keyboard plugged in that hub, the rpi4 won’t boot. Unplug the power and it does boot.
If I use a different powered USB 3 hub, it boots fine with power, but the mouse must be unpluged and re-pluged to work, but it works fine on other hub.
I can not explain any of the above. My advise… try some other arrangement, maybe something will work for you. But I doubt it is the power supply or your overclocking. Yes, overclocking pulls more power… but I bet USB is the issue.
As much as I love the Pi, I’ve been consistently disappointed with the USB subsystem. It’s entirely too finicky. (You may recall my previous adventures with a 2.5Gbps ethernet adapter. I felt so bad about that, like I made @Darksky do a bunch of hacking for nothing.)
At the same time, it’s hard to beat the 9W power consumption for home server use.
I solved this problem–when I plugged the DVD burner in, I jostled the crappy power brick that came with the DeskPi case (it’s pretty much the shape of one of those small iPhone chargers that come in the box). It was out of line just enough to undervolt even without the DVD burner plugged in. I cleaned up the arrangement, and it’s fine.
I am le tired, so I haven’t tried turning the DVD drive back on yet. Tomorrow.
Tomorrow, I’ll take a closer look at the silk-screening on the back of the DeskPi PSU to see exactly what it’ rated for, and compare that to the Canakit 3.5A version, as well as a spare Apple iPhone charger I have.
In the meantime, @kerry_s, I’m intrigued by your remarks re: the config.txt directives.
Which kernel handles overvolting without explicit commands? I can’t find it via search. I’d love to have a cleaner config.txt.
Re: Minimum Clock Setting. The 5.10.x and 5.12.17 kernels seem to recognize it, whether or not it has any impact.
Here’s the 5.13.x kernel, on an older 4GB Pi:
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
On-line CPU(s) list: 0-3
Vendor ID: ARM
Model name: Cortex-A72
Thread(s) per core: 1
Core(s) per cluster: 4
CPU max MHz: 2000.0000
CPU min MHz: 1000.0000
Flags: fp asimd evtstrm crc32 cpuid
Itlb multihit: Not affected
L1tf: Not affected
Mds: Not affected
Meltdown: Not affected
Spec store bypass: Vulnerable
Spectre v1: Mitigation; __user pointer sanitization
Spectre v2: Vulnerable
Srbds: Not affected
Tsx async abort: Not affected
@linux-aarhus , that’s what threw me. The DVD drive I’m using is powered by a massive external power supply. I had assumed I’d be fine. I do have a powered USB 3 hub, but my older Raspberry Pi 4b 4GB was extermely crashy with it.
As noted above, part of my issue was poor connectivity into the power strip. I haven’t retested since then. I need to.