Groups > linux.debian.bugs.dist > #1051514

Bug#983466: Is a mesa-bug

From	Gert van de Kraats <vd.Kraats@hccnet.nl>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#983466: Is a mesa-bug
Date	2021-03-08 22:10 +0100
Message-ID	<BQvix-7yL-3@gated-at.bofh.it> (permalink)
References	<BM5G1-as-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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because wayland itself needs 2 fence registers for 2 momitors  i
and X11 only 1.
A trace without using wayland shows the 15th register is used without
giving any problem:

Feb 24 20:10:59 debian systemd[1270]: Started GNOME Shell on X11.

Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 0 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 1 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 2 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 3 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 4 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 5 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 6 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 7 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 8 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 9 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 10 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 11 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 12 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 13 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 14 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 15 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 1 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 2 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 3 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 4 0
Feb 24 20:11:29 debian gnome-shell[1505]: GK_intelClearWithBlit_fences 5 0
.....
....
So this seems to be  a mesa bug and an exact duplicate
of https://gitlab.freedesktop.org/mesa/mesa/-/issues/790 .

Only the kernel-driver-error has changed and is misleading now.

I add the mesa-2.3.4-patch I currently use, which solves the problem.

Testing for register-overflow is done after updating the batch, If 
overflow occurs

the batch is restored to the situation before the last update, the 
buffer is flushed

and the batch again is updated with the last update.

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Bug#983466: Is a mesa-bug Gert van de Kraats <vd.Kraats@hccnet.nl> - 2021-03-08 22:10 +0100
  Bug#983466: Is a mesa-bug Salvatore Bonaccorso <carnil@debian.org> - 2021-03-13 14:10 +0100

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