Frank Azor claims that Dell has fixed many DPC latency related issues

Another month goes by, and Dell is still sowing seeds of hope that it is edging closer to fixing the DPC latency issues that have affected some XPS 15 9570 laptops and other XPS machines. DPC, or Deferred Procedure Call, allows drivers to activate tasks and the system to prioritise them. However, buggy or poorly written drivers can hog resources by making numerous DPC instructions, which can cause audio stutters and glitches as the system struggles to prioritise audio playback over multiple instructions from other sources.

Dell has been quiet on its progress with addressing these issues having redirected all DPC-related updates to its social media team last month, and prevented one of its engineering technologists from doing so. However, Frank Azor has since tweeted that XPS 15 9570 owners should install a set of recently updated Realtek audio drivers as "many cases have been resolved with these". You can find the driver files on Dell support or go directly to the US download page here.

Azor also claimed that Dell will be issuing a new BIOS revision within two weeks, which will "solve most of the other root causes" of these DPC-related issues. We remain sceptical as the company said back in October that they would be fixed "soon" and it has a history of delaying XPS 15 9570 BIOS releases.

As always, we shall keep you updated with any further news or changes. Please let us know if the update audio driver has resolved any of the audio glitches and stutters that have been affecting your XPS 15 9570.