Re: [BISECTED]: Black screen on 7.0-rc1

[Thorsten Leemhuis]

On 2/26/26 05:08, David Gow wrote:
> Le 25/02/2026 à 12:57 AM, Linus Torvalds a écrit :
>> On Mon, 23 Feb 2026 at 23:59, Harald Arnesen <linux@xxxxxxxxxxx> wrote:
>>>
>>>>>> In fact, I would expect it to be related to one (or both) of
>>>>>>       f2ae92780ab9 ("firewire: ohci: split page allocation from
>>>>>>       993ab48006b3 ("firewire: ohci: stop using page private to store >>>>>> dma mapping")
>>>>> Should I try reverting one or both of these?
>>>> Yes. From a quick check, they revert cleanly (revert 993ab48006b3
>>>> first) and the result seems to compile cleanly too.
>>> I can confirm that the kernel boots with these two reverted.
>>> I have attached the new dmesg output.
>> Thanks. I guess it's up to Takashi to figure out what exactly goes
>> wrong, but it's good to have this confirmed. I hope you'll be willing
>> to test any patches that Takashi comes up with.
>> And if we can't figure it out, I guess reverting them is the right
>> thing, but let's wait until at least rc2 is imminent before we do
>> that.
> I am also seeing this, and can confirm that reverting the whole firewire
> pull fixes it here.

TWIMC, John ran into a problem with mentioned f2ae92780ab9 commit that
from a brief look looks similar to the one Harald reported. And Takashi
posted a fix for it here:
https://lore.kernel.org/lkml/20260228031255.GA832746@workstation.local/

Not sure why Takashi did not reply here. Feels a bit like I'm missing
something.

Ciao, Thorsten