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To: Bagas Sanjaya , Linux Regressions , Linux Kernel Mailing List , Linux Wireless , Broadcom 80211 Devices , SHA cyfmac Subsystem , Linux Kernel Network Developers Cc: Hante Meuleman , Pieter-Paul Giesberts , Franky Lin , Arend van Spriel , Kalle Valo , julien.falque@gmail.com References: <018f62d0-ee1d-9198-9c38-e45b10921e2e@gmail.com> Content-Language: en-US From: Hans de Goede In-Reply-To: <018f62d0-ee1d-9198-9c38-e45b10921e2e@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 5/15/23 04:21, Bagas Sanjaya wrote: > Hi, > > I notice a regression report on bugzilla [1]. Quoting from it: > >> julien.falque@gmail.com 2023-05-14 09:55:38 UTC >> >> Since a Kernel update a few weeks ago, my laptop freezes when resuming from hibernation. It seems to handle the resume process normally but at the moment I should see Gnome login screen, I either get a black screen with just a white underscore instead, or nothing displayed at all (no backlight). I can't do anything at that point and I have to hard reboot. >> >> Steps to reproduce: >> - hibernate >> - resume >> - wait until the resuming process should finish: black screen instead of e.g. Gnome's login screen >> >> journalctl gives nothing between the beginning of the resume and the crash, as if it never happened. >> >> I have a Dell XPS 15 (9550) with Arch Linux. The issue happens on linux (since v6.2.0 I think) but linux-lts (currently v6.1.28) is fine. >> >> A bisect on linux-git gave commit da6d9c8ecd00 as the cause of the problem. > > See bugzilla for the full thread. > > Julien: I asked you to also provide dmesg log as I don't know > what exactly happened, but you mentioned the culprit was > da6d9c8ecd00e2 ("wifi: brcmfmac: add firmware vendor info in driver info"), > which implies that the crash involves your wifi device. From my experience > though, GDM crashes are usually caused by xwayland. > > Anyway, I'm adding this to regzbot: > > #regzbot introduced: da6d9c8ecd00e2 https://bugzilla.kernel.org/show_bug.cgi?id=217442 > #regzbot title: brcmfmac firmware vendor info addition triggers GDM crash on resuming from hibernation da6d9c8ecd00e2 is known to cause a NULL pointer deref on resume, which is likely what is happening here. This is fixed by: https://lore.kernel.org/regressions/20230510141856.46532-1-hdegoede@redhat.com/ This patch is ready for merging and is waiting for the wireless-maintainer to merge it and send it to Linus. Regards, Hans > [1]: https://bugzilla.kernel.org/show_bug.cgi?id=217442 >