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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - nouveau black screen and errors with two monitors attached"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92274#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - nouveau black screen and errors with two monitors attached"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92274">bug 92274</a>
from <span class="vcard"><a class="email" href="mailto:imirkin@alum.mit.edu" title="Ilia Mirkin <imirkin@alum.mit.edu>"> <span class="fn">Ilia Mirkin</span></a>
</span></b>
<pre>In your first dmesg, you have:
video=HDMI-0:e video=DVI-I-1:e
Are these required for something? Force-enabling this stuff just leads to
trouble down the line.
Interesting....
[ 8.872612] nouveau E[ PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x690400 [ IBUS ]
[ 8.872781] nouveau E[ PBUS][0000:01:00.0] MMIO write of 0xbadf1001 FAULT
at 0x690400 [ IBUS ]
[ 8.872869] nouveau E[ PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT
at 0x6904c0 [ IBUS ]
[ 8.873043] nouveau E[ PBUS][0000:01:00.0] MMIO write of 0xbadf1001 FAULT
at 0x6904c0 [ IBUS ]
in drm/nouveau/nvkm/engine/disp/hdmigk104.c:
/* AVI InfoFrame */
nvkm_mask(device, 0x690000 + hdmi, 0x00000001, 0x00000000);
nvkm_wr32(device, 0x690008 + hdmi, 0x000d0282);
nvkm_wr32(device, 0x69000c + hdmi, 0x0000006f);
nvkm_wr32(device, 0x690010 + hdmi, 0x00000000);
nvkm_wr32(device, 0x690014 + hdmi, 0x00000000);
nvkm_wr32(device, 0x690018 + hdmi, 0x00000000);
nvkm_mask(device, 0x690000 + hdmi, 0x00000001, 0x00000001);
/* ??? InfoFrame? */
nvkm_mask(device, 0x6900c0 + hdmi, 0x00000001, 0x00000000);
nvkm_wr32(device, 0x6900cc + hdmi, 0x00000010);
nvkm_mask(device, 0x6900c0 + hdmi, 0x00000001, 0x00000001);
690000 + hdmi / 6900c0 + hdmi each get 2 reads/writes, but you only see one
error, both times on the enable. I wonder if this code doesn't need to be more
like
u32 foo = nvkm_rd32(device, 0x690000 + hdmi);
nvkm_wr32(device, 0x690000 + hdmi, foo & ~1);
...
nvkm_wr32(device, 0x690000 + hdmi, foo | 1);
and same sort of thing for the second section. Are comfortable enough with code
to try this on your own, or do you need patches?</pre>
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