https://bugs.freedesktop.org/show_bug.cgi?id=107919
--- Comment #4 from main.ha...@gmail.com ---
Thanks for your reply, Ilia.
(In reply to Ilia Mirkin from comment #3)
> The intel max
> on IVB is most likely 8k, but having trouble confirming it.
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.
> There's no real benefit to using nouveau ddx for the secondary screens, so
> you should also experiment with using modesetting for those.
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?
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