Hi,
On 29-04-18 10:42, Christian Dersch wrote:
Hi,
should I also get the freeze from the F28 live media?
Yes, you should, but I just got the second of the 3 users reporting
this to confirm that on his T450s the hang happens rarely, say
about once a day, so unless you want to run the live-media for
a long time, testing with F28 live is not really going to be helpful.
The 3th reporter reports he can trigger the issue at will (on a
different model) by changing the LCD panel brightness, so if you
can give that a try that would be great. Please try changing the
brightness both through the hotkeys and through the system-menu
(top right menu of the gnome shell top-bar).
Regards,
Hans
I have a T450s
(which worked fine with your LPM test kernels few months ago) but cannot
migrate to 28 yet. >
Greetings,
Christian
On 04/29/2018 10:34 AM, Hans de Goede wrote:
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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