Kernel update from 6.2.0-35 to 6.2.0-36 lead to unusable display on MacBook Air with NVIDIA GeForce 320m

[Kerem Gümrükcü]

Hi,

after updating a (lubuntu) system from 6.2.0-35 to 6.2.0-36 kernel, the entire screen turn into a unusable flickering color puzzle. not sure what exactly the root cause for this is. possible wrong refresh rate/resolution detected by the kernel? doing input like switching blindely to a virtual console and doing a login blindely following a poweroff works fine. input isnt affacted at all as long as you can type virtually blind on a color puzzled console. a picture is attached. Kernel 6.2.0-35 works fine. Its a elder MacBook Air with a core2duo running nvidia geforce 320m graphics card using the nouveau driver. attaching a "nomodeset" to the kernel command line makes the screen work again on the 6.2.0-36 kernel, but disables all the power stuff of the gfx card including brightness control and related things. not a permanent solution. as said, picture attached. system is lubuntu based on 22.04.3 lts.

best regards

K.

[Paul White (paulw2u)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

  apport-collect 2042835

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected.

You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Kerem Gümrükcü (kerrygee)]

This definitly is related somehow to the 6.2.0-36 kernel and/or ubuntu, because other distributions like Bodhi basing on ubuntu packages/core exactly behave the same with a scrambled/puzzled display running the 6.2.0-36 kernel from ubuntu. This seems to be a major issue.

[Kerem Gümrükcü (kerrygee)]

Extra system information with dmesg nouveau crash stack added: