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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - DRM NOUVEAU: cannot boot with kernel >=3.7"
href="https://bugs.freedesktop.org/show_bug.cgi?id=58776#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - DRM NOUVEAU: cannot boot with kernel >=3.7"
href="https://bugs.freedesktop.org/show_bug.cgi?id=58776">bug 58776</a>
from <span class="vcard"><a class="email" href="mailto:balducci@units.it" title="gabriele balducci <balducci@units.it>"> <span class="fn">gabriele balducci</span></a>
</span></b>
<pre>Thanks a lot.
1) I cannot find (or I am not able to recognize) any option related to
AGP/IOMMU in my BIOS menu.
Following advice in
<a href="http://www.kernel.org/doc/Documentation/x86/x86_64/boot-options.txt">http://www.kernel.org/doc/Documentation/x86/x86_64/boot-options.txt</a>,
I have booted with iommu=soft, which apparently makes the IOMMU
complaint go away from demsg, but I don't know if this is really a
solution...
In any case, booting with (only) iommu=soft, does not make any
difference: i.e. the machine freezes as above
2) The nouveau.vram_pushbuf=1 option allows me to boot fine (with or
without the iommu=soft option above)!
However, now X11 has problems.
After starting X11, text in menus (e.g. emacs, firefox) and in
window borders is made of unreadable black rectangles; text in
windows (e.g. xterm text lines, text in emacs buffers etc) are fine, though.
This problem goes away if I boot into X11 with
Option "Accel" "Off"
i.e.: if I switch acceleration off, everything works nicely (but,
of course, I have no acceleration)
I have attached dmesg for kernel 3.6.10 (which works perfectly), the
new dmesg for kernel 3.7.1 with iommu=soft and nouveau.vram_pushbuf=1,
my xorg.conf and xorg.0.log for kernel 3.6.10 and 3.7.1 (with/without
accel)
I'll be happy to send any other information which might help to
clarify this problem
thank you very much again
ciao
gabriele</pre>
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