Hello,

the nouveau driver seems to work really worse from debian version to
version.
That's the main reason still Debian 11 is used, because Debian 12 is
hanging very often in animated graphics.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1041044

This time a screenrecording only works one time and now only this error
message can be seen:

$ vokoscreenNG
nouveau: kernel rejected pushbuf: Kein passendes Gerät gefunden
nouveau: ch11: krec 0 pushes 1 bufs 8 relocs 0
nouveau: ch11: buf 00000000 00000002 00000004 00000004 00000000
nouveau: ch11: buf 00000001 00000006 00000004 00000000 00000004
nouveau: ch11: buf 00000002 0000000d 00000004 00000004 00000000
nouveau: ch11: buf 00000003 0000001b 00000002 00000000 00000002
nouveau: ch11: buf 00000004 0000001c 00000004 00000004 00000000
nouveau: ch11: buf 00000005 0000000e 00000002 00000000 00000002
nouveau: ch11: buf 00000006 0000001d 00000002 00000000 00000002
nouveau: ch11: buf 00000007 0000001e 00000002 00000000 00000002
nouveau: ch11: psh 00000000 0000001cc0 0000001e38
nouveau:        0x200140c5
nouveau:        0x00000080
nouveau:        0x20054088
nouveau:        0x00000030
nouveau:        0x00000080
nouveau:        0x00000040
nouveau:        0x00000001
nouveau:        0x00000000
nouveau:        0x200240c3
nouveau:        0x00000000
nouveau:        0x00252000
nouveau:        0x2002408e
nouveau:        0x00000000
nouveau:        0x00b00000
nouveau:        0x200240d3
nouveau:        0x00000000
nouveau:        0x00000000
nouveau:        0x200240c7
nouveau:        0x00000080
nouveau:        0x00000040
nouveau:        0x200140c0
nouveau:        0x00100010
nouveau:        0x200140c5
nouveau:        0x00000080
nouveau:        0x20054088
nouveau:        0x00000030
nouveau:        0x00000080
nouveau:        0x00000040
nouveau:        0x00000001
nouveau:        0x00000000
nouveau:        0x200240c3
nouveau:        0x00000000
nouveau:        0x00b04000
nouveau:        0x2002408e
nouveau:        0x00000000
nouveau:        0x00b02000
nouveau:        0x200240d3
nouveau:        0x00000000
nouveau:        0x00000000
nouveau:        0x200240c7
nouveau:        0x00000080
nouveau:        0x00000040
nouveau:        0x200140c0
nouveau:        0x00100010
nouveau:        0x20040360
nouveau:        0x00000000
nouveau:        0x00000000
nouveau:        0x00000000
nouveau:        0x00000000
nouveau:        0x200203fd
nouveau:        0x00400000
nouveau:        0x00400000
nouveau:        0x20010487
nouveau:        0x00000001
nouveau:        0x20090200
nouveau:        0x00000000
nouveau:        0x00b06000
nouveau:        0x00000040
nouveau:        0x00000040
nouveau:        0x000000ee
nouveau:        0x00000030
nouveau:        0x00000001
nouveau:        0x00000000
nouveau:        0x00000000
nouveau:        0x80000574
nouveau:        0x80010556
nouveau:        0x60010674
nouveau:        0x0000003c
nouveau:        0x80010556
nouveau:        0x20040360
nouveau:        0x3f000000
nouveau:        0x3f000000
nouveau:        0x3f000000
nouveau:        0x3f000000
nouveau:        0x200203fd
nouveau:        0x00200000
nouveau:        0x00200000
nouveau:        0x20010487
nouveau:        0x00000001
nouveau:        0x20090200
nouveau:        0x00000000
nouveau:        0x00b08000
nouveau:        0x00000020
nouveau:        0x00000020
nouveau:        0x000000da
nouveau:        0x00000020
nouveau:        0x00000001
nouveau:        0x00000000
nouveau:        0x00000000
nouveau:        0x80000574
nouveau:        0x80010556
nouveau:        0x60010674
nouveau:        0x0000003c
nouveau:        0x80010556
vokoscreenNG: ../nouveau/pushbuf.c:723: nouveau_pushbuf_data:
Zusicherung »kref« nicht erfüllt.
Abgebrochen

Any ideas what can be done except buying newer hardware?

Cheers
karsten