Re: kern/55198: When the video card is Intel Mobile 965GM Express,i915drmkms has error CPU pipe A FIFO underrun, also X freezes/hangs

["John D. Baker" <jdbaker%consolidated.net@localhost>]

The following reply was made to PR kern/55198; it has been noted by GNATS.

From: "John D. Baker" <jdbaker%consolidated.net@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
Subject: Re: kern/55198: When the video card is Intel Mobile 965GM
 Express,i915drmkms has error CPU pipe A FIFO underrun, also X freezes/hangs
Date: Fri, 8 May 2020 11:14:44 -0500 (CDT)

 Please consider a lower bound on chips defaulting to UXA.  As I have posted
 in this PR, chips that are "old enough" work with SNA just fine.  There
 are only some chips "in the middle" that fail with SNA.
 
 Old, works w/SNA:  i82810e, i82845, i82915
 
 Not as old, fails w/SNA: i82945, i82946, i82G41, i82Q45
 
 New, works w/SNA, needs TearFree:  ???
 
 These are the ones I know about and have tested.  I don't know what the
 "generation" values are for the working chips.  If a lower bound is
 implemented, perhaps it can be refined as more data becomes available.
 
 -- 
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