Sadly but not help.
1. uninstall with ddu 20.12.1
2. install as you say 19.5.1
3. patched driver with atikmdag-patcher
4. turn off pc
5. wait 10-15 min
5. cold boot to Windows7 - after logo i still have no signal
yes - if downloaded from monitortest atikmdag-patcher is safe.
can you reinstall Win7 again?
is Win7 fully updated?
strange is that it works fine in Win10 - but not Win7
and the reason it works with safe-mode implies that its a driver issue // it cant be hw issue as it runs fine in Win10...
>can you reinstall Win7 again?
Yes, but what is sense? I am already done that two days ago. At first time all working good before Windows update even with last 20.12.1 Adrenaline. But after massive Windows update signal is start droping again. Or i can be wrong. May be root of problem in different place. Motherboard, monitor, ram xmp, uefi\legacy boot, etc.
ps Anyways thanks a lot to you for your attention to my question!
pps I can of course ignore it but but I'm curious about the reason
Probably found a reason. I was using ram with xmp at non auto factory defaults, ram is 3200 xmp but i set 2933 xmp. If i use ram without xmp or with xmp auto factory values 3200(in my case) hdmi signal not drop even at cold boot.
ok - now you have to report that as bug to your MoBo OEM ;)
Sorry i am wrong( Signal is still drops even with my ram "tricks" How you think, if signal not drop at safe mode its 100% driver issue? And why it drop only at cold boot if it software problem. IDK, huh(
if it only drops in cold boot it could also be a BIOS issue
flash latest BIOS to MoBo
Already tryed downgrade and upgrade bios, same. I am try 19.4.1 driver. And one more trick. I put in autostart win7 restart.exe from CRU utility it must restart driver at starting desktop, if it so i see that driver cause drop singnal or not.
I make shortcut to desktop for restart.exe from CRU utility that restart video driver. And make hotkey for this shortcut. When signal is drop, i whait for while desktop run and press hotkey for restart driver, and after driver restart signal is appear. What can be connection beetwen video driver, hdmi signal and ram settings?
if the RAM is instable it can cause errors in the GPU driver ;)
but maybe there is also a bug in GPU driver for you...
please report your issue to amd.com/report