Nvidia released a new driver update for its GeForce graphics cards that, among other things, introduced a new Video Super Resolution upscaling technology that could make low-resolution videos look better on high-resolution displays. However, the driver (version 531.18) also apparently came with a bug that caused high CPU usage on some PCs after running and then closing a game.
Nvidia has released a driver hotfix (version 531.26) that acknowledges and should fix the problem, which was apparently caused by an undisclosed bug in the “Nvidia container”, a process that mostly exists to contain other processes, that comes with the Nvidia drivers. It also fixes a “random error checking” issue that may affect some older laptops with GeForce 1000 series or MX250 and MX350 GPUs.
Not all PCs running the newer Nvidia drivers were affected by the bug—some journalists observed the behavior on their systems while others did not. Even relatively low CPU usage in the 10 to 15 percent range can have a noticeable effect on performance by taking CPU cycles away from other tasks and preventing the CPU from going into an idle state. This generates more heat and uses more power and can also affect the battery life of laptops.
Another recent software bug in Nvidia’s drivers caused games to run slower when the Discord app was running in the background; an application profile issue prevented the GPU memory from reaching its maximum clock speeds, reducing the frame rate accordingly. This fix could be pushed silently in the background to PCs running Nvidia’s software, but installing the fix for the CPU usage bug requires you to download and install Nvidia’s typical 850MB driver package.