** Tags added: somerville ** Summary changed:
- jammy-oem-6.5: one more pannel needs to disable psr2 + jammy-oem-6.5: one more panel needs to disable psr2 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-6.5 in Ubuntu. https://bugs.launchpad.net/bugs/2046681 Title: jammy-oem-6.5: one more panel needs to disable psr2 Status in HWE Next: New Status in linux-oem-6.5 package in Ubuntu: Invalid Status in linux-oem-6.5 source package in Jammy: In Progress Bug description: BugLink: https://bugs.launchpad.net/bugs/2046681 [Impact] The customer Dell provide the edid for one more panel, this panel also needs to disable the psr2, otherwise the display will not work correctly [Fix] There is no real fix so far, ODM recommends to use a workaround to disable PSR2, this is a temp solution, after we get the real fix, we could revert the temp workaround. [Test case] booting with the patched kernel, If the pannel's edid is in the qurik list, the PSR2 will be disabled (checking /sys/kernel/debug/dri/0/i915_edp_psr_status; if the pannel's edid is not in the quirk list, the graphic driver will work as before. [Where problems could occur] It is possible that the temp solution couldn't work, then the screen will still show garbage and the screen is flicking, another possible regression is the screen has no problem before, but after running patched kernel, the PSR2 is disabled and the system cost more power, but this possibility is very low, I tested the patched on some dell machines, all worked well. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2046681/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
