Appreciate for the reminder, it's working now.
Here is what I tried. Change an PSU, the new one can provide 5v, 2.4A power supply, still stuck there, till I remove the USB keyboard, surprised me, cause it's work very well when I use the F25.
Best wishes - Send from my mobile ________________________________ From: ryniker@ryniker.org ryniker@ryniker.org on behalf of Richard Ryniker ryniker@alum.mit.edu Sent: Wednesday, August 2, 2017 8:45:09 PM To: Peter Robinson Cc: dexper@outlook.com; arm@lists.fedoraproject.org Subject: Re: [fedora-arm] Re: Help about install version 26
If nothing looks more promising, try a different display. I have experienced a problem that resembles yours when I tried to use a modern Dell 4K resolution (8 megapixel) display with my RPi 3. An older display (without 4K capability) works. I have not tried my high resolution display recently, but will conduct an experiment with up-to-date F26 software if there is any interest.
I do not know whether this display sensitivity was present with F25 - other problems made it necessary for me to blacklist VC4 for F25 (and pre-release F26.)