[Bug 285516] graphics/drm-61-kmod: 6.1.92.1402000_3 artifacts probably memory related

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285516

            Bug ID: 285516
           Summary: graphics/drm-61-kmod: 6.1.92.1402000_3 artifacts
                    probably memory related
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: x11@FreeBSD.org
          Reporter: p5B2EA84B3@t-online.de
             Flags: maintainer-feedback?(x11@FreeBSD.org)
          Assignee: x11@FreeBSD.org

Created attachment 258802
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=258802&action=edit
Screenshot showing sample artifact

On FreeBSD 14.2-RELEASE amd64
with drm-61-kmod-6.1.92.1402000_3
> pciconf -lv|grep -B4 VGA
vgapci0@pci0:0:2:0:     class=0x030000 rev=0x09 hdr=0x00 vendor=0x8086
device=0x0122 subvendor=0x8086 subdevice=0x2003
    vendor     = 'Intel Corporation'
    device     = '2nd Generation Core Processor Family Integrated Graphics
Controller'
    class      = display
    subclass   = VGA

Flickering artifacts appear on screen that look to me as visible memory changes
suggesting that memory ranges for graphics are used by other applications. The
artifacts appear randomly when watching a video with firefox and also on other
windows on other work surface. 

See screenshot attached.

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