Public bug reported:
[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.
** Affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: High
Status: Confirmed
** Also affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided
Status: New
** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Status: New => Confirmed
** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided => High
** Changed in: linux-oem-6.1 (Ubuntu)
Status: New => Invalid
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-6.1 in Ubuntu.
https://bugs.launchpad.net/bugs/2021572
Title:
dGPU cannot resume because system firmware stuck in IPCS method
Status in linux-oem-6.1 package in Ubuntu:
Invalid
Status in linux-oem-6.1 source package in Jammy:
Confirmed
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-oem-6.1/+bug/2021572/+subscriptions
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