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@kerneltoast.com
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@vger.kernel.org # 5.4.x Signed-off-by: Sultan Alsawaf sultan@kerneltoast.com
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