[Nouveau] [Bug 98398] Acer Aspire V7-582PG (Haswell, GTX 750M) fails to power off GPU with runtime PM

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Oct 24 10:09:46 UTC 2016


Peter Wu <peter at lekensteyn.nl> changed:

           What    |Removed                     |Added
            Summary|[Nouveau] Vgaswitcharoo     |Acer Aspire V7-582PG
                   |fails to turn off GPU       |(Haswell, GTX 750M) fails
                   |properly                    |to power off GPU with
                   |                            |runtime PM
                 CC|                            |peter at lekensteyn.nl

--- Comment #8 from Peter Wu <peter at lekensteyn.nl> ---
Pablo, the issues that bbswitch has is different from the one reported here.
bbswitch is not updated for 4.8 requiring the pcie_port_pm=off workaround.

There are more details for this bug from the reporter in IRC (search for

In particular, Rick reported that the issue apparently also appears with older
kernels, including 4.3 to 4.8. This is significant and a surprising result
because kernel 4.8 plus pcie_port_pm=off (or the d3cold_allowed change) should
have the same result as 4.7 or before. Rick, can you re-test it with 4.7?

It also occurs to me that older kernels might not support your GPU, so be sure
to keep a dmesg around.

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