Red Hat, Fedora and Ubuntu have been carrying (an older iteration of)
the attached patch for a while. It makes external displays on laptops
such as the Lenono P50, which wires them to the discrete GPU only,
usable without explicit configuration by the end user (e.g., arranging
to run xrandr --setprovideroutputsource during login).

I've been testing this on my laptop for a few days and haven't seen any
particular problems with it (I have filed separate bugs for the other
issues that I've seen while testing).

NB, after applying the patch, you still have to enable the AutoBindGPU
option in a ServerFlags section of xorg.conf. It would be nice if the
functionality could be enabled by default, as it is in the other
distributions that ship earlier versions of the patch.

Hi,

I'm using using the above mentioned patch for more than one year
without any issue, with 2 PCI express GPU Ati R230 and Debian Sid.

Eachtime a new revision of xserver-xorg is published I must recompile
to include the patch, but it the patch fails to fully apply on xserver
1.20.1-5

I took the freedom to update it; you can find it in attachment.

Greeting to you once again



I am writing for the second time as I did not receive any reply from you to
my previous message.



Kindly reply so we can discuss the subject as soon as possible.



Sincerely,



Andy Landman

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