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Message-ID: <d6b93806-2d0b-40b2-a795-16ab78bc0048@leemhuis.info>
Date: Thu, 7 Aug 2025 09:07:11 +0200
From: Thorsten Leemhuis <regressions@...mhuis.info>
To: Andy Mindful <andy.mindful@...il.com>, regressions@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
 intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 linux-acpi@...r.kernel.org, rafael@...nel.org,
 ville.syrjala@...ux.intel.com, tglx@...utronix.de,
 Christian Brauner <brauner@...nel.org>, Jani Nikula <jani.nikula@...el.com>,
 Paolo Bonzini <pbonzini@...hat.com>,
 "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
Subject: Re: [REGRESSION] tty lockup and WWAN loss after hibernate/suspend in
 6.8+ on ThinkPad X1 Carbon Gen 10

On 06.08.25 10:40, Andy Mindful wrote:
> 
> Can somebody advise how to properly bisect issues in linux-stable
> repository between v6.7.11 to v6.8-rc1 tags?

You can't directly bisect, as their development paths diverged with
v6.7; so if 6.7.11 is working, it might be due to a change that was
added between 6.7 and 6.7.11 (this is unlikely, but a possibility). So
you have to check if 6.7 is working and then bisect between 6.7 and
6.8-rc1 (in case 6.7 was fine) or between 6.7 and 6.7.11 (in case it was
not).

But TBH: from your bisection results you shared in this thread so far it
looks a bit like your test is unreliable. Likely because it's a timing
issue or something like that which makes things work or not. That, the
age of kernels you try to bisect, and what Maciej explained elsewhere in
this thread at
https://lore.kernel.org/all/cfc561fb-29a9-4a19-a2e5-0f3f28e5e63a@maciej.szmigiero.name/
makes me think that it's not worth a bisection, as I guess the result is
unlikely to change anything (but I could be wrong).

Ciao, Thorsten


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