Tiny Core Base > Raspberry Pi
No HDMI output when booting from USB drive on rPi W2
atomant:
--- Quote from: Paul_123 on February 12, 2025, 02:24:55 PM ---There should be nothing needed for a HDMI signal showing the console. Plain HDMI cable/monitor works for me.
If you want graphics (i.e. vc4 overlays) Then you need to load the graphics kernel modules (graphics-KERNEL.tcz)
--- End quote ---
Console is fine, i don't need a graphics environment.
atomant:
--- Quote from: Rich on February 12, 2025, 01:38:20 PM ---Hi atomant
Maybe you need to add something like:
--- Code: ---waitusb=5
--- End code ---
to your cmdline.txt file?
--- End quote ---
Hi Rich :)
Good suggestion, I tried it but no effect. :(
atomant:
--- Quote from: mocore on February 12, 2025, 08:05:33 PM ---what spec PSU?
--- End quote ---
All are 5V (obviously), one is 2.4A max, the second is 4A max, the third is 3.1A max (tho this latter one i suspect is on paper as it's some no name Chinese cheapo charger).
--- Quote from: mocore on February 12, 2025, 08:05:33 PM ---things to try
- power supply with *more* amps !!
--- End quote ---
I tried one with max 6A output, no change. This also gave me the opportunity to measure currents and with the USB hub connected without external power it never went above 0.6A, with the HUB powered it never went above 0.3A, so I'd say it's not the power that's the problem here.
--- Quote from: mocore on February 12, 2025, 08:05:33 PM ---- different usb (could be faulty?)
--- End quote ---
You mean the hub? As i said, tried without the hub, no change, and i tested the hub on my computer, connected things, worked flawlesly, doesn't seem to be the culprit.
--- Quote from: mocore on February 12, 2025, 08:05:33 PM ---- "official" raspberry OS image (sd & usb) , if you sill have
"randomly - unstable : flashes/disappears/blinks " hdmi
... it will no doubt be of interest to hw manufactures / might be firmware/hw fault?
( if more amps/PSU/ ect fails to resolve issues )
--- End quote ---
I'll try this later.
Thank you for your thoughts.
mocore:
--- Quote from: atomant on February 13, 2025, 03:36:42 AM ---You mean the hub? As i said,
...
Thank you for your thoughts.
--- End quote ---
tbh i just scanned you post for any mention of *PSU amps
and after not spotting anything obvious
just threw my *generic* faulty-pi advice out there
(mostly gleaned on reading the pi forum's since ( i guess pre)2011 )
there where some interesting historical threads on implementing usb
.. most interesting bits where (imho) in relation to working around
hw that dose not follow the spec
if you ruled out power , my (non "pro") guess would be fw/hw issue
especially if you allready tried alternative hw (monitor/psu) ect
core-user:
Many people have problems trying to power RPi with phone chargers, they don't supply a constant voltage, buy an official PSU....
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version