** Changed in: linux (Ubuntu Lunar)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/2021572
Title:
dGPU cannot resume because system firmware stuck in IPCS method
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-6.1 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Invalid
Status in linux-oem-6.1 source package in Jammy:
Fix Released
Status in linux source package in Lunar:
Fix Committed
Status in linux-oem-6.1 source package in Lunar:
Invalid
Bug description:
[Impact]
When a dGPU on a laptop is in PCIe D3cold and TBT port is connected to a
monitor via a cable, unplugging the cable will make the dGPU unable to resume
to D0.
[Fix]
There's a part of system firmware, IOM, need the driver to disconnect all
TBT/Type-C phy to let dGPU function normally.
[Test]
With the fix applied, the dGPU continues to work after replugging video cable
many times.
[Where problems could occur]
The fix is composed of several overhaul, so it's likely to regression i915
GFX driver. To limit the impact, only target OEM kernel for now.
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