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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