** Changed in: linux (Ubuntu Utopic)
Status: New => Fix Committed
** Changed in: linux (Ubuntu Trusty)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1398544
Title:
Please enable CONFIG_PCIEASPM_DEBUG
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Trusty:
Fix Committed
Status in linux source package in Utopic:
Fix Committed
Status in linux source package in Vivid:
Fix Released
Bug description:
[Impact]
CONFIG_PCIEASPM_DEBUG (which is currently disabled for Ubuntu kernels) can be
used to enable/disable ASPM settings per PCIE device. CONFIG_PCIEASPM (which is
enabled for Ubuntu kernels) allows only to set global ASPM policy. BIOSes on
more machines are buggy and lot of times do not configure ASPM for PCIE device
property. CONFIG_PCIEASPM_DEBUG option allows users or testers to hotfix
potential bugs in BIOS... That config option only add new sysfs files so it
should not break anything else in kernel.
[Test Case]
Try to use PCIe ASPM sysfs debug interface.
[Fix]
Enable CONFIG_PCIEASPM_DEBUG
vivid discussion:
https://lists.ubuntu.com/archives/kernel-team/2014-December/051914.html
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