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Fri, 8 Aug 2025 12:03:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754654597; bh=VyLVjvFvcueI6+wKwx97PRnYKMkUL7Nt3qh+EPNEz6Q=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=H0kWHa28Srgbxe0k8U7Fqj8yGciW9s0dkbgVcYfh4SCREaV1qcUnnKAd4fML7bjl1 WQCg4M9XU5Gk15B1kpHd7ntWG2OAHfk//VTI/TS/uygJZo1rUYxv+9tvV6nG00WdqR lOFv0Ej4+SU7l+GowjAEKJbyQB/84P/UTiAdMDFgNrhqCcVtZzgG/jyATTX06tMrL1 9BgWlmuUNz9Ep+VbSCwaNc/XXSYUVXalm0iKKwXVBjHjtFKqX2ngCL8ZNF96Q4Qtsi 1rbSxwbUwBNVgeNhd66PnLQWRtyjO5F8GnNCgM3OWlDKxFEyFCNVT1YvwLN7DaXUuj b5jf6mXJJOjwg== Message-ID: <069d1243-5d4e-4594-89a3-63278d63681d@kernel.org> Date: Fri, 8 Aug 2025 07:03:14 -0500 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 User-Agent: Mozilla Thunderbird Subject: Re: radeon_fbdev_river_fbdev: failed to initialize framebuffer and setup emulation To: Christian Zigotzky Cc: mad skateman , Alex Deucher , 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 References: <66083d23-e60c-4fce-bad0-81dbb9dcebde@kernel.org> <0B029DD9-085A-4AD2-B3A0-4C427A1540EA@xenosoft.de> Content-Language: en-US From: Mario Limonciello In-Reply-To: <0B029DD9-085A-4AD2-B3A0-4C427A1540EA@xenosoft.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 8/8/25 6:47 AM, Christian Zigotzky wrote: > > >> On 08 August 2025 um 01:23 pm, Mario Limonciello wrote: >> >>  >> >>> 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/907a7a2e5bf40c6a359b2f6cc53d6fdca04009e0 >>> help? >>> - - - >>> Hello Mario, >>> Thanks a lot for your patch. >>> I tested it today but unfortunately it doesn’t solve the issue with the Radeon framebuffer. >>> I have created two kernels with and without the drm-next-2025-07-30 updates [1] because of the issue with the Radeon graphics framebuffer device #15. [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 drm-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=60606#p60606 >>> - https://forum.hyperion-entertainment.com/viewtopic.php?p=60595#p60595 >>> 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=260f6f4fda93c8485c8037865c941b42b9cba5d2 >>> [2] https://github.com/chzigotzky/kernels/issues/15 >> >> I think there is a mistake in your bisect, which I notice from looking at your other user reports. >> >> The original commit you identified in your bisect and thus CC'ed me came in 6.16-rc1. >> >> ❯ git describe --contains 4d4c10f763d7808fbade28d83d237411603bca05 >> v6.16-rc1~50^2~19^2 >> >> There absolutely was a regression for that was raised, but this was fixed in 6.16-rc3. >> >> ❯ git describe --contains 907a7a2e5bf40c6a359b2f6cc53d6fdca04009e0 >> v6.16-rc3~13^2~1 >> >> Users in your forums posts talk about 6.16 final working fine. So I think that when you bisected you ran into multiple confounding issues and replicated in a similar fashion. You should check every single bisect step to see if 4d4c10f763d7808fbade28d83d237411603bca05 is applied. If it's applied but 907a7a2e5bf40c6a359b2f6cc53d6fdca04009e0 is not applied in that step you should apply 907a7a2e5bf40c6a359b2f6cc53d6fdca04009e0. >> >> Hopefully that will get you down to the real cause. > > Thanks for the hint. Unfortunately I don’t have more time for figuring out the issue. > > Two facts: > > - The Radeon driver can no longer be used. > The Radeon driver is broken for us. > > - The issue is somewhere in the commit drm-next-2025-07-30 updates [1]. > > I cannot provide any more due to time constraints. > > I've already spent time that I didn't actually have. > > Thanks for your help. > > Christian > > If you're sure that the issue was raised in that merge commit, I suggest you (or someone else affected by this issue) do the bisect using the drm kernel tree [1] and bisect between the problematic tag [2] and previous tag [3]. [1] https://gitlab.freedesktop.org/drm/kernel [2] https://gitlab.freedesktop.org/drm/kernel/-/tags/drm-next-2025-07-30 [3] https://gitlab.freedesktop.org/drm/kernel/-/tags/drm-next-2025-06-06