Hi,
On 29-04-18 09:25, Hans de Goede wrote:
Hi All,
I'm sending this to the fedora-kernel and -devel lists
both to get the kernel team aware of this and because it
is not entirely clear to me how to best deal with this.
I guess we should get this added to the release-notes /
common-bugs page for F28, but I'm not sure what the
procedure is for that ?
I've just become aware that at least for some users
the use of SATA LPM in F28 causes the Lenovo 50
series laptops (confirmed X250, T450s G50-80) freeze/
hang hard under certain conditions when using SATA
LPM, independent of the disk used (*).
This is currently being tracked in:
https://bugzilla.redhat.com/show_bug.cgi?id=1571330
A known workaround is to add: "ahci.mobile_lpm_policy=0"
to the kernel boot command line.
Can someone help me to get this documented? Once we've
figured out what is going on I hope to be able to fix this
with a kernel update, but people may still need the
workaround to install Fedora 28.
Also if people are using Fedora 28 on a 50 series Lenovo
laptop without issues, please let me know.
Some more info on this, the user with a x250 is reporting
the problem is hard-freeze about once a day, which goes
away when disabling LPM, so if you have a 50 series Lenovo
laptop and are seeing the occasional hard-freeze this may
be the cause.
Regards,
Hans
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