Pinghao Qi, the issue you are reporting is an upstream one. Could you
please report this problem to the appropriate mailing list (platform-
driver-x86 CC Matthew Garrett ) by following the instructions verbatim
at https://wiki.ubuntu.com/Bugs/Upstream/kernel ?
Please provide a direct URL to your e
Pinghao Qi, could you please provide the missing information following
https://wiki.ubuntu.com/DebuggingKernelSuspend ?
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https://bugs.launchpad.net/bugs/1449357
Title:
Thinkpad T450s un
** Tags added: kernel-bug-exists-upstream-4.1-rc1
** Tags added: trusty utopic
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https://bugs.launchpad.net/bugs/1449357
Title:
Thinkpad T450s unable to resume after suspended for a lon
So I tested with 4.1rc and it also doesn't work with intel rapid start.
I set the rapid start timer to immediate in BIOS and as soon as I close
the lid and open it back up, I was unable to resume to where I was.
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Pinghao Qi, just to advise, 4.0 is not the latest mainline kernel.
Hence, could you please advise to the results requested in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1449357/comments/4
?
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I was testing with the newest 4.0 stable kernel.
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https://bugs.launchpad.net/bugs/1449357
Title:
Thinkpad T450s unable to resume after suspended for a long time
To manage notifications
Pinghao Qi, just to clarify, were you testing kernel 4.1-rc1 or 4.0.x?
** Tags added: latest-bios-1.12
** Description changed:
My laptop shows a black screen when resumes from suspend. I'm unable to
log in with ctrl-alt-f1 then ctrl-alt-f7. I'm able to control the
keyboard backlight, the L
After more researching and testing, I've determined that the bug is
caused by the Intel Rapid Start technology in BIOS. It had a timer of 3
hours after laptop sleeps. I disabled that in BIOS and resume from
suspend started working just fine. I don't know if this is a Ubuntu bug
or a BIOS bug.
--
After more testing, I left the laptop in suspend overnight with kernel
4.0, and it fails to resume in the morning. So the same bug still exists
in kernel 4.0.
** Tags removed: kernel-fixed-upstream
** Tags added: kernel-bug-exists-upstream
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After some preliminary testing with kernel 4.0, it seems that the bug is
fixed. I'll do more testing tomorrow. However, I've been getting the
following error message at startup when using kernel 4.0.
Error parsing PCC subspaces from PCCT.
Starting version 219
thinkpad_acpi: unsupported brightness
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.0 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix th
pm-suspend.log shows this error line. Everything else is success.
Running hook /usr/lib/pm-utils/sleep.d/60_wpa_supplicant suspend suspend:
Failed to connect to non-global ctrl_ifname: (null) error: No such file or
directory
/usr/lib/pm-utils/sleep.d/60_wpa_supplicant suspend suspend: success.
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