As for work-arounds: the simplest and quickest for the moment would be to boot the previous kernel, but as it was said that opens up some security issue that the current upload tried to fix. We work on fixing the regression as soon as possible.
Moving to a HWE stack seems to be another option but one which comes with a lot more change to the system. And the more change the more risk something may break. Both HWE kernels look to work correctly with the security fix applied.
As for work-arounds: the simplest and quickest for the moment would be to boot the previous kernel, but as it was said that opens up some security issue that the current upload tried to fix. We work on fixing the regression as soon as possible.
Moving to a HWE stack seems to be another option but one which comes with a lot more change to the system. And the more change the more risk something may break. Both HWE kernels look to work correctly with the security fix applied.