Date: Sat, 8 May 2021 21:46:53 +0200 From: Matt K <kilikmatej@gmail.com> To: Graham Perrin <grahamperrin@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: kld_list="drm" (was: i915kms kernel module causing freezes on FreeBSD 13.0-RELEASE) Message-ID: <CA%2B4jMaopYJcjofTY5t42bCc%2B8-w08KJjFy34yHY-y1kxup0Xjg@mail.gmail.com> In-Reply-To: <849f51ec-86a9-ccd8-8bde-175c27b15270@gmail.com> References: <CA%2B4jMao_YgwF_Jn8CG8ucU0c7AgnmoBknMtPEhPet0XcJJrr9A@mail.gmail.com> <68023ace-7338-5e39-28f9-22bf1ff78365@gmail.com> <alpine.BSF.2.20.2105072136430.96788@tripel.monochrome.org> <CA%2B4jMaqH7-Z7YCtoxvHdeOwA_g=s1=wuw3RfsueUuiPeAk1kng@mail.gmail.com> <849f51ec-86a9-ccd8-8bde-175c27b15270@gmail.com>
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Interesting, I read through all that info. Interesting info for me was from Polytropon about the module loading order. I experimented a bit and loaded i915kms through /usr/local/etc/rc.d script and it also worked. But this does not surprise you, I suppose. Thank you for all those links. Your persistence through the years is certainly inspiring. Shouldn't your findings be mentioned in the handbook? By at least a few words, such as: "if you have problems with kld_list=radeonkms/i915kms, try kld_list=drm". Apparently, there are some people with similar problems, so maybe solving the problem preemptively by documenting it, is the way to go. I don't know the protocol here, this is my first time contacting the FreeBSD mailing list. On Sat, May 8, 2021 at 1:52 PM Graham Perrin <grahamperrin@gmail.com> wrote: > On 08/05/2021 07:10, Matt K wrote: > > On Sat, May 8, 2021 at 1:08 AM Graham Perrin <grahamperrin@gmail.com> > wrote: > >> >> Try a third approach: >> >> kld_list="drm" >> >> > This works. I will keep an eye on the system, logs, etc, and let you know > what I find. Now everything seems to be working as advertised. With > xf86-video-intel, even TearFree is working. > Where is this behavior documented? > > > FreeBSD for Pretty Little Unicorns, 1st Edition. > > > How did you know about this solution? > > > It came to me in a dream. Whispered by the ghost of Barbara Stanwyck, once > the highest-paid woman in the United States and famed for movies such as > 'Sorry, Wrong Number'. Lesser-known but no less valuable contributions to > postmodern creative thinking include 'Sorry, Wrong Module'. > > > I think that this means that my problem is solved, but the question > remains: why does i915kms cause freezes when loaded from rc.conf and works > normally when loaded by hand? This is not handbook-documented behavior. Nor > is it consistent or transparent. > > > Maybe not Intel-specific. > > I find kld_list="drm" less troublesome than kld_list="radeonkms" with > Thames [Radeon HD 7550M/7570M/7650M] with SDDM. A recent probe: > <https://bsd-hardware.info/?probe=e90abb54c9#d10>; > <https://bsd-hardware.info/?probe=e90abb54c9#d10>. > > My voyage of discovery spanned around three years. Maybe longer. A few > flashbacks: > > > <https://lists.freebsd.org/pipermail/freebsd-current//2018-September/071327.html>; > <https://lists.freebsd.org/pipermail/freebsd-current//2018-September/071327.html>; > (2018) I found kld_list="/boot/modules/radeonkms.ko" troublesome with > FreeBSD 12.0-ALPHA7 > > > <https://lists.freebsd.org/pipermail/freebsd-questions/2018-October/283113.html>; > <https://lists.freebsd.org/pipermail/freebsd-questions/2018-October/283113.html>; > (2018) "… toying with the possibility that … a specific load/start order > might help." > > > <https://github.com/FreeBSDDesktop/kms-drm/issues/101#issuecomment-450776731>; > <https://github.com/FreeBSDDesktop/kms-drm/issues/101#issuecomment-450776731>; > (2019) I found drm-legacy-kmod better than drm-current-kmod with > 13.0-CURRENT > > > <https://lists.freebsd.org/pipermail/freebsd-current/2020-November/077693.html>; > <https://lists.freebsd.org/pipermail/freebsd-current/2020-November/077693.html>; > (2020) kld_list="/boot/modules/drm.ko" worked for me, keyword: > > peculiar > > Eventually I condensed the working peculiarity to kld_list="drm". > > More accurately (in context – SDDM, KDE Plasma and so on): > <https://pastebin.com/4XjNFaKk>; <https://pastebin.com/4XjNFaKk>; line 17. > -- MK
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