Finally, my oldie is goldie!
1. I upgrade to W10 and got horrific resolution(I could see in device manager my graphic card installed but with warning sign)
2. Tried to update it, failed. It was up to date.
3. Dxdiag showed me some basic card(better say no card)
4. I downloaded chipset drivers from official Acer page. Push install and it finished in couple of seconds(Something is fishy,imo).
5. OFC No.4 didn't work.
6. Well let's try to uninstall and install again(nowadays called reinstall
).
7. WUT???? my resolution is fine WTF just happened?!?!? Uninstall brought my video card to life.
8. Quickly to the device manager....... I can see my graphic cards, let's try right click and update.
9. IT WORKED. Somehow. Don't know...