kernel-packages team mailing list archive
Mailing list archive
[Bug 1552216] Re: Laptop hangs during second time it suspends
I'm not sure I understand. I'm totally fine with waiting for 16.04 if the issue is solved in that release. But why would that make this bug invalid?
Also, since you're asking for a backport, did you identify the cause of the bug?
And, let's not forget ;) Thank you Christopher for helping me.
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
Laptop hangs during second time it suspends
Status in linux package in Ubuntu:
When I want to suspend my computer for the second time it hangs. It
does not react to any keyboard input or the power button. The only way
to recover is to hold the power button several seconds to reboot the
I followed the procedure mentioned at
https://wiki.ubuntu.com/DebuggingKernelSuspend. To reproduce I first
completely suspend the laptop, e.g. by closing the lid or by using the
pm-suspend command. After wakeup from suspend I start following the
procedure. At the step where the command "echo devices >
/sys/power/pm_test" is given the laptop hangs during suspend. It does
not reach suspended state, as the power remains on. On reboot, the
Magic number says: "memory memory48: hash matches"
I have a HP Pavilion 15 laptop with an Intel Skylake processor. I have experienced this on kernel 4.2.0 (Ubuntu 4.2.0-30.35-generic 4.2.8-ckt3), but also on kernels 4.4.1 an 4.4.3 (taken from mainline kernel release). After installation of 15.10 I made the following changes for hardware support:
- I installed rtlwifi-new-dkms from http://ppa.launchpad.net/hanipouspilot/rtlwifi/ubuntu/. This has support for antenna selection which my wifi requires (auto selection does not work, I use parameter ant_sel for module rtl8723be)
- I installed nvidia-352-updates and bumblebee to support the graphics card
- I use kernel parameter pci=noaer to avoid dmesg being flooded with the same message (see bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1521173)
I upgraded to the latest BIOS.
One thing I noticed is that there is a difference between before the first suspend and after the first suspend to the contents of cat /proc/acpi/wakeup > wakeup.
After the boot, and before the first suspend this line is reported:
PXSX S5 *disabled pci:0000:04:00.0
After the first suspend and resume this line becomes:
PXSX S5 *enabled pci:0000:04:00.0
If I read lspci correctly device 0000:04:00.0 is "Signal processing
controller : Intel Corporation Device [8086:1903] (rev 08)"
Thanks for looking into this.
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-30-generic 4.2.0-30.35
ProcVersionSignature: Ubuntu 4.2.0-30.35-generic 4.2.8-ckt3
Uname: Linux 4.2.0-30-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
USER PID ACCESS COMMAND
/dev/snd/controlC0: jan 4087 F.... pulseaudio
Date: Wed Mar 2 13:12:42 2016
InstallationDate: Installed on 2016-02-03 (27 days ago)
InstallationMedia: Error: [Errno 13] Permission denied: '/var/log/installer/media-info'
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0bda:b006 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 0bda:57eb Realtek Semiconductor Corp.
Bus 001 Device 006: ID 0461:4d03 Primax Electronics, Ltd Kensington Mouse-in-a-box
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: HP HP Pavilion Notebook
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-30-generic.efi.signed root=UUID=43cbb8c2-c0ce-40e2-a795-3a506e63d450 ro quiet splash pci=noaer vt.handoff=7
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.chassis.version: Chassis Version
dmi.product.name: HP Pavilion Notebook
To manage notifications about this bug go to: