This article provides information on the possible causes an ATIKMDAG. Qca9377 Driver Windows 10. sys type error may occur and how to troubleshoot the system to prevent the error from reoccurring. Issue Description: During startup or use of an application, (most commonly a game / video application) the system or application will freeze, crash or exit to the desktop / a blue screen (BSOD). Additionally, an error message appears stating that the “Display driver stopped responding and has recovered” and may reference one of the following driver files: • ATIKMDAG.sys • ATI2DVAG.sys • ATI2CQAG.dll • ATIVPK. Bt Dongle Driver Windows 10. sys • AMD2DVAG.sys • AMDKMDAG.sys • AMDVPK.sys Issue Cause: The issue occurs when the Timeout Detection and Recovery (TDR) feature available in Windows Vista® and Windows 7 detects that the graphics card (GPU) has not responded within a predetermined period of time and reinitializes it with the Windows Display Driver Model (WDDM) to prevent the need to reboot. There is no single cause for a TDR event to be triggered.