Apple has apparently taken issue with Imagination Technologies statements against it, and now says that the GPU maker knew that Apple was cutting back on its technologies since 2015, well before the public declaration in the spring.
Apple's previous chip manufacturer Imagination Technologies has returned to profitability on paper, but has made no progress with Apple regarding its contention that the iPhone manufacturer won't be able to make its own GPU technology without infringement.
Apple's split-up with graphics tech supplier Imagination Technologies has entered into a "dispute resolution procedure," the latter company announced on Thursday, also revealing that it plans to sell off two of its businesses, MIPS and Ensigma.
Apple is pulling out of a partnership with Imagination Technologies, the British company behind the graphics technology used in iOS devices, with Apple's decision to stop using Imagination's intellectual property within two years prompting the UK firm's shares to plunge in value by more than 60 percent.
Imagination confirmed on Wednesday that Samsung's forthcoming flagship device, the Galaxy S IV, will transition from ARM graphics to Imagination's PowerVR SGX 544MP GPU — the same graphics tech featured in Apple's iPhones and iPads.