This bug was fixed in the package linux - 4.15.0-76.86
---------------
linux (4.15.0-76.86) bionic; urgency=medium
* bionic/linux: 4.15.0-76.86 -proposed tracker (LP: #1860123)
* Integrate Intel SGX driver into linux-azure (LP: #1844245)
- [Packaging] Add systemd service to load intel_sgx
* [Regression] Bionic kernel 4.15.0-71.80 can not boot on ThunderX
(LP: #1853326) // Bionic kernel panic on Cavium ThunderX CN88XX
(LP: #1853485) // Cavium ThunderX CN88XX crashes on boot (LP: #1857074)
- arm64: Check for errata before evaluating cpu features
- arm64: add sentinel to kpti_safe_list
linux (4.15.0-75.85) bionic; urgency=medium
* bionic/linux: 4.15.0-75.85 -proposed tracker (LP: #1859705)
* use-after-free in i915_ppgtt_close (LP: #1859522) // CVE-2020-7053
- SAUCE: drm/i915: Fix use-after-free when destroying GEM context
* CVE-2019-14615
- drm/i915/gen9: Clear residual context state on context switch
* PAN is broken for execute-only user mappings on ARMv8 (LP: #1858815)
- arm64: Revert support for execute-only user mappings
* [Regression] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
(LP: #1856608)
- SAUCE: Revert "usb: handle warm-reset port requests on hub resume"
* Miscellaneous Ubuntu changes
- update dkms package versions
-- Marcelo Henrique Cerri <[email protected]> Fri, 17 Jan
2020 10:59:22 -0300
** Changed in: linux (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1856608
Title:
[Regression] usb usb2-port2: Cannot enable. Maybe the USB cable is
bad?
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Bionic:
Fix Released
Status in linux source package in Disco:
Fix Released
Status in linux source package in Eoan:
Fix Released
Status in linux source package in Focal:
Incomplete
Bug description:
This appears to be a regression between 4.15.0-70.79 and 4.15.0-72.81.
This bug was fixed by simply reverting the offending change. Bug 1859873
tracks root causing the issue and reapplying the change w/ any necessary fixes.
[Impact]
USB port unusable and boot time takes ~5 minutes longer to complete.
Kernel emits messages like:
usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[Test Case]
dmesg | grep "Cannot enable"
[Fix]
[Regression Risk]
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