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Fri, 8 Aug 2025 15:30:16 +0200 (CEST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Christian Zigotzky X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list Mime-Version: 1.0 (1.0) Subject: Re: radeon_fbdev_river_fbdev: failed to initialize framebuffer and setup emulation Date: Fri, 8 Aug 2025 15:30:05 +0200 Message-Id: References: Cc: Mario Limonciello , mad skateman , ville.syrjala@linux.intel.com, Jeff Johnson , Darren Stevens , hypexed@yahoo.com.au, linuxppc-dev , Christian Zigotzky , =?utf-8?Q?Christian_K=C3=B6nig?= , Hans de Goede , Wu Hoi Pok , amd-gfx@lists.freedesktop.org, Alexander Deucher , "R.T.Dickinson" , bhelgaas@google.com, benato.denis96@gmail.com, Yijun_Shen@dell.com, David Perry , rafael@kernel.org, dri-devel@lists.freedesktop.org In-Reply-To: To: Alex Deucher X-Mailer: iPhone Mail (22G86) > On 08 August 2025 at 02:56 pm, Alex Deucher wrote := >=20 > =EF=BB=BFOn Fri, Aug 8, 2025 at 7:48=E2=80=AFAM Christian Zigotzky > wrote: >>=20 >>=20 >>=20 >>>> On 08 August 2025 um 01:23 pm, Mario Limonciello w= rote: >>>=20 >>> =EF=BB=BF >>>=20 >>>> On 8/8/25 2:36 AM, Christian Zigotzky wrote: >>>> On 07 August 2025 at 04:21 pm, Limonciello, Mario wrote: >>>> Does applying >>>> https://github.com/torvalds/linux/commit/907a7a2e5bf40c6a359b2f6cc53d6f= dca04009e0 >>>> help? >>>> - - - >>>> Hello Mario, >>>> Thanks a lot for your patch. >>>> I tested it today but unfortunately it doesn=E2=80=99t solve the issue w= ith the Radeon framebuffer. >>>> I have created two kernels with and without the drm-next-2025-07-30 upd= ates [1] because of the issue with the Radeon graphics framebuffer device #1= 5. [2] >>>> Download and further information: https://github.com/chzigotzky/kernels= /releases/tag/v6.17.0-alpha5 >>>> I have tested both kernels this week and I can definitely confirm, that= the issue is somewhere in the commit drm-next-2025-07-30 updates [1]. >>>> The Radeon graphics framebuffer doesn't work with the kernel with the d= rm-next-2025-07-30 updates [1]. Without these updates, the framebuffer works= . >>>> I bisected yesterday. [2] >>>> There are some other user reports: >>>> - https://forum.hyperion-entertainment.com/viewtopic.php?p=3D60606#p606= 06 >>>> - https://forum.hyperion-entertainment.com/viewtopic.php?p=3D60595#p605= 95 >>>> They use other Radeon graphics chips. >>>> @All >>>> Please check the drm-next-2025-07-30 updates [1] >>>> Thanks, >>>> Christian >>>> [1] https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.= git/commit/?id=3D260f6f4fda93c8485c8037865c941b42b9cba5d2 >>>> [2] https://github.com/chzigotzky/kernels/issues/15 >>>=20 >>> I think there is a mistake in your bisect, which I notice from looking a= t your other user reports. >>>=20 >>> The original commit you identified in your bisect and thus CC'ed me came= in 6.16-rc1. >>>=20 >>> =E2=9D=AF git describe --contains 4d4c10f763d7808fbade28d83d237411603bca= 05 >>> v6.16-rc1~50^2~19^2 >>>=20 >>> There absolutely was a regression for that was raised, but this was fixe= d in 6.16-rc3. >>>=20 >>> =E2=9D=AF git describe --contains 907a7a2e5bf40c6a359b2f6cc53d6fdca04009= e0 >>> v6.16-rc3~13^2~1 >>>=20 >>> Users in your forums posts talk about 6.16 final working fine. So I thi= nk that when you bisected you ran into multiple confounding issues and repli= cated in a similar fashion. You should check every single bisect step to se= e if 4d4c10f763d7808fbade28d83d237411603bca05 is applied. If it's applied b= ut 907a7a2e5bf40c6a359b2f6cc53d6fdca04009e0 is not applied in that step you s= hould apply 907a7a2e5bf40c6a359b2f6cc53d6fdca04009e0. >>>=20 >>> Hopefully that will get you down to the real cause. >>=20 >> Thanks for the hint. Unfortunately I don=E2=80=99t have more time for fig= uring out the issue. >=20 > Does this patch help? > https://patchwork.kernel.org/project/dri-devel/patch/20250805175752.690504= -4-imre.deak@intel.com/ >=20 > Alex Yes, it helps. The Radeon framebuffer works again. Thank you=