Re: PROBLEM: AMD Ryzen 9 7950X iGPU - Blinking Issue

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On Mon, May 1, 2023 at 2:44 PM Felix Richter <judge@xxxxxxxxxxxxxxxxx> wrote:
>
> On 01.05.23 15:27, Alex Deucher wrote:
> > On Mon, May 1, 2023 at 3:20 AM Felix Richter <judge@xxxxxxxxxxxxxxxxx> wrote:
> >> Hi,
> >>
> >> I am running into an issue with the integrated GPU of the Ryzen 9 7950X. It seems to be a regression from kernel version 6.1 to 6.2.
> >> The bug materializes in from of my monitor blinking, meaning it turns full white shortly. This happens very often so that the system becomes unpleasant to use.
> >>
> >> I am running the Archlinux Kernel:
> >> The Issue happens on the bleeding edge kernel: 6.2.13
> >> Switching back to the LTS kernel resolves the issue: 6.1.26
> >>
> >> I have two monitors attached to the system. One 42 inch 4k Display and a 24 inch 1080p Display and am running sway as my desktop.
> >>
> >> Let me know if there is more information I could provide to help narrow down the issue.
> > It's related to scatter/gather display.  As a workaround, you can
> > disable scatter/gather display by setting amd.sg_display=0 on the
> > kernel command line in grub.  It's fixed properly in:
> > https://gitlab.freedesktop.org/agd5f/linux/-/commit/08da182175db4c7f80850354849d95f2670e8cd9
> > Which should land in Linus' tree this week.
> >
> > Alex
>
> Thank you for your quick response. Sadly I have to report that using the
> workaround kernel parameter did not resolve the issue for me. The
> monitor still
> turns full white although less frequently. I'll be sure to look out for
> the update once it hits mainline ;)

If the module parameter didn't help then perhaps you are seeing some
other issue.  Can you bisect?

Alex

>
> Kind regards,
> Felix




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