I have same problem with my W8100
(driver 15.201.2401-151104a-296716C-Retail_End_User, Win 10 up to date, i7 5930k, Asus X-99-a/USB 3.1, 32GB DRR4 2666 QC Corsair)
Launching sniffer.exe (PhotoShop 2015 CC gl info tracker) I see :
GLRenderer is correctly listed as "AMD FirePro W8100"
GLMemoryMB is not correct with 0 MB reported... the mistake should come from here : bad test from PS ? or bad answer from Firepro W8100 Graphic Card GL driver ?
CLMemoryMB is correct with 8192 (8GB for OpenCL at least)
Some GL_PARAMETERS request/answers seem to get null result also (reported by "?" with Adobe PS sniffer.exe)
in AMD windows registry parts Hardwareinformation.memorysize and Hardwareinformation.qwmemorysize are not null. I didn't find any field related to memory elsewhere
I have reported the issue on Adobe feedback forum also : Photoshop: Solution for amd firepro driver 15.201.2401.0
Please AMD solve this issue quickly with Adobe.
Our 10 bits display chain is completely broken, like 3d hardware acceleration as well.
Thank in advance
Any update on this issue? I'm seeing the same problem with an AMD W5000. Windows 10 64-bit, AMD Firepro W5000, AMD driver 15.201.2401, Adobe Photoshop Version: 2015.1.1 20151209.r.327 2015/12/09:23:59:59 CL 1055659 x64.
An update: If I uninstall the latest AMD driver for my Firepro W5000 (AMD driver 15.201.2401) and then use Windows Update it downloads a driver that seems to work fine with Adobe Photoshop. Windows Device Manager identifies the driver as version 15.201.1151.1008.
I did the same, and now Photoshop, Lightroom, Nik Software and Resolve work with the GPU.
If incidently somebody from AMD is reading this: It would be helpful to have a resource with older drivers to download. Of course more preferred would be fixing this with Adobe.
I just wanted to share this link you: https://twitter.com/AMDRadeon/with_replies. As you can see, someone on Twitter has been experiencing a similar problem, for which we’ve found a workaround while we investigate further.
(The tweet, will point you to this post in the Photoshop forum: http://feedback.photoshop.com/photoshop_family/topics/i-found-a-solution-for-amd-firepro-driver-15-201-2401-0)
I hope the above helps
Feedback a few months later, after an update of Photoshop yesterday I installed today the FirePro Beta driver (Version 16.3 from March 17th, 2016) and all good now.