** Description changed:
+ [SRU Justification]
+
+ [Impact]
+
+ Systems with Intel(R) PRO/1000 I219 ethernet adapter [8086:550c] may
+ block entrance of modern standby.
+
+ [Fix]
+
+ This is a composition of multiple factors. For the e1000e driver to suspend
correctly, it takes:
+ * v6.12-rc1 commit
[cedf233530cc3](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cedf233530cc375343c5a0b612fe94392f246c99)
("platform/x86: intel/pmc: Ignore all LTRs during suspend")
+ * v6.12-rc3 commit
[9d9e5347b0354](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d9e5347b035412daa844f884b94a05bac94f864)
("e1000e: change I219 (19) devices to ADP")
+
+ And there is also a problem in APIC working in deadline mode. When shutting
down the APIC timer, both APIC_LVT_MASKED and clear the counter register should
be done, and this takes:
+ *
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/urgent&id=ffd95846c6ec6cf1f93da411ea10d504036cab42
("x86/apic: Always explicitly disarm TSC-deadline timer")
+
+ [Test Case]
+
+ ```
+ $ sudo cat /sys/power/suspend_stats/total_hw_sleep
+ 0
+ $ sudo rtcwake -m freeze -s 120
+ # wait ...
+ $ sudo cat /sys/power/suspend_stats/total_hw_sleep
+ 117855416
+ $ sudo cat /sys/kernel/debug/pmc_core/package_cstate_show
+ ...
+ Package C10 : 117924661
+ ```
+
+ [Where problems could occur]
+
+ The first part can be treated as a new hardware support. The APIC timer
+ part is a common issue probably tracing back to the Nehalem microm
+ architecture. It has been landed to x86/urgent tree and will be in
+ v6.12-rc4. It's also cc-stabled.
+
+ [Other Info]
+
+ This is cc-stabled. We're probably going to meet it again for maybe 6.8
+ LTS kernels. Before that, SRU for OEM-6.11 hardware enablement.
+
+ ========== original bug report ==========
+
Proposed fixes from vendor:
* v6.12-rc1 commit cedf233530cc3 ("platform/x86: intel/pmc: Ignore all LTRs
during suspend")
* v6.12-rc3 commit 9d9e5347b0354 ("e1000e: change I219 (19) devices to ADP")
*
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/urgent&id=ffd95846c6ec6cf1f93da411ea10d504036cab42
("x86/apic: Always explicitly disarm TSC-deadline timer")
- *
https://lore.kernel.org/lkml/[email protected]/
- *
https://lore.kernel.org/lkml/[email protected]/
80:1f.6 Ethernet controller [0200]: Intel Corporation Device [8086:550c] (rev
10)
DeviceName: To Be Filled by O.E.M.
Subsystem: Dell Device [1028:0d07]
Kernel driver in use: e1000e
Kernel modules: e1000e
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Status: Confirmed => In Progress
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Importance: Undecided => High
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Assignee: (unassigned) => You-Sheng Yang (vicamo)
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https://bugs.launchpad.net/bugs/2081130
Title:
Intel(R) PRO/1000 I219 ethernet adapter [8086:550c] may block entrance
of modern standby
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