Older laptops with AMD/Intel 'switchable' graphics trying to upgrade to W10 have big issues. Any 1st or 2nd generation Intel processor with HD2000 or HD3000 (or older HD graphics) are not supported under Win 10 and no matter what AMD graphics is associated with it, will have switchable graphics problems. Intel released a chart making it very clear:
The below tables provide a comprehensive list of supported operating systems on a per-processor or graphics technology basis. Use the links below to find the appropriate section containing your Intel® graphics product and its associated operating system support.
When I read your post, I understand that the problem is caused by the Intel HD3000 (in my case; my Aspire 7750G has a i5-2410M processor). But is it possible to set the Intel Graphics off and work only with the AMD Graphics (HD6650M)? Or is this option not a solution for the problem with the flickering horizontal lines?
Certain laptops allow you to disable GPUS,for example my thinkpad t420 allows me to disable either the integrated GPU,or the dedicated one(it's an Nvidia but the principle is the same).My friend has an elitebook 8460p and it also allows him to disable gpus.
As mentioned above, some laptops do have the option in the bios to select either dynamic (switchable) or static/fixed (IGP disabled)...but not all of them. You should check for a bios update from the laptop manufacturer as some have enabled that option via a update.
If you have Intel+Amd graphics you can try the Leshcat drivers. You will NOT be getting Crimson, but the latest WHQL drivers and they work. Pay attention to the instructions concerning Win10... Unified Leshcat Driver Manual Please do not ask any Leshcat issues or questions here. Ask on their forum.
Please do not ask ANY Leshcat questions in this post. Start your own thread.