On Mon, Mar 30, 2020 at 10:51:04AM +0200, Greg KH wrote: > On Sun, Mar 29, 2020 at 08:30:56PM -0700, Sultan Alsawaf wrote: > > From: Sultan Alsawaf <sultan@xxxxxxxxxxxxxxx> > > > > On all Dell laptops with panels and chipsets that support PSR (an > > esoteric power-saving mechanism), both PSR1 and PSR2 cause flickering > > and graphical glitches, sometimes to the point of making the laptop > > unusable. Many laptops don't support PSR so it isn't known if PSR works > > correctly on any consumer hardware as of 5.4. PSR was enabled by default > > in 5.0 for capable hardware, so this patch just restores the previous > > functionality of PSR being disabled by default. > > > > More info is available on the freedesktop bug: > > https://gitlab.freedesktop.org/drm/intel/issues/425 > > > > Cc: <stable@xxxxxxxxxxxxxxx> # 5.4.x > > Signed-off-by: Sultan Alsawaf <sultan@xxxxxxxxxxxxxxx> > > --- > > drivers/gpu/drm/i915/i915_params.c | 3 +-- > > drivers/gpu/drm/i915/i915_params.h | 2 +- > > 2 files changed, 2 insertions(+), 3 deletions(-) > > What is the git commit id of this patch in Linus's tree? > > thanks, > > greg k-h This isn't in Linus' tree. I know for a fact that 5.4 has broken PSR support that'll never be fixed, but I wasn't sure if PSR was still broken in 5.6. However, I tested 5.6 for a bit right now and PSR is still broken. And to top it off, I managed to reproduce some PSR glitches with the drm-tip branch, so there's currently no kernel in existence with functional PSR. :) I will send this patch for inclusion in Linus' tree, so please disregard it for now. Thanks, Sultan
