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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - RandR unable to set Screen Size when using Intel+nouveau"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107919#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - RandR unable to set Screen Size when using Intel+nouveau"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107919">bug 107919</a>
from <span class="vcard"><a class="email" href="mailto:main.haarp@gmail.com" title="main.haarp@gmail.com">main.haarp@gmail.com</a>
</span></b>
<pre>Thanks for your reply, Ilia.
(In reply to Ilia Mirkin from <a href="show_bug.cgi?id=107919#c3">comment #3</a>)
<span class="quote">> The intel max
> on IVB is most likely 8k, but having trouble confirming it.</span >
This is correct, xrandr reports a maximum of 8192x8192.
However, when not using nouveau (i.e. this bug is not triggered), I'm getting
the error message
xrandr: screen cannot be larger than 8192x8192 (desired size 9999x9999)
While the error I'm getting when this bug is triggered is different:
X Error of failed request: BadValue (integer parameter out of range for
operation)
Major opcode of failed request: 139 (RANDR)
Minor opcode of failed request: 7 (RRSetScreenSize)
Value in failed request: 0x0
Serial number of failed request: 57
Current serial number in output stream: 58
It's also weird that something that shouldn't touch the FB, such as setting a
primary output, also fails with this.
Another note: Before Nouveau, I ran the Nvidia card with the propietary driver
on a separate X server together with intel-virtual-output. i-v-o provides
virtual outputs on the Intel side and proxies them to the second X server.
While the performance was terrible (which is why I switched to
nouveau+provideroutputsource, thanks so much for creating Nouveau!), there were
no problems setting screen sizes. But maybe i-v-o also used some sort of magic.
<span class="quote">> There's no real benefit to using nouveau ddx for the secondary screens, so
> you should also experiment with using modesetting for those.</span >
Ah, I didn't know this was possible. I will of course lose the last remnants of
rendering performance from the Nvidia, but if it allows monitors to work well,
that's worth it. I will try that once I have the time. I assume this will not
help with IVB's small FB, correct?</pre>
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