Date: Tue, 26 Jan 2021 11:15:17 +0200 From: Toomas Soome <tsoome@me.com> To: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl> Cc: Graham Perrin <grahamperrin@gmail.com>, freebsd-current@freebsd.org Subject: Re: DRM and Radeon Message-ID: <5DFFA1C6-EBC3-4C22-B678-45BA48C9ECF1@me.com> In-Reply-To: <4933479c-b5a6-fa2e-09be-f5a0190d6f1b@plan-b.pwste.edu.pl> References: <24590.137.690675.515036@jerusalem.litteratus.org> <68acb1a8-fcf8-a065-70d5-061669e2f70b@daemonic.se> <24591.35500.33066.12845@jerusalem.litteratus.org> <20210126070211.GB43439@FreeBSD.org> <fd462bcf-d631-9034-88d2-727c7ecc9e8e@gmail.com> <4933479c-b5a6-fa2e-09be-f5a0190d6f1b@plan-b.pwste.edu.pl>
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> On 26. Jan 2021, at 10:18, Marek Zarychta = <zarychtam@plan-b.pwste.edu.pl> wrote: >=20 > W dniu 26.01.2021 o 08:58, Graham Perrin pisze: >> On 26/01/2021 07:02, Alexey Dokuchaev wrote: >> > Re: loading drm crashes system >> > =E2=80=A6 There are known issues with Radeon cards, they were quite = well >> > supported a year ago, then something got broken. I've promised to >> > bisect this and find the cause, but there were several >> > syscall-related changes in -CURRENT though the course of the last >> > year, so bisecting just the kernel is not enough (machine won't get >> > to login prompt if the userland does not match), which cripples the >> > process. >> > >> > I still intend to take this quest, just not sure when. :( >> > >> > ./danfe >> Any cards in particular? >> = <https://old.reddit.com/r/freebsd/comments/kyoxmc/freebsd_quarterly_status= _report_fourth_quarter/gjiw3y3/> =E2=80=93 whilst I didn't mention = Radeon there, for me it _was_ the Radeon story that seemed to improve a = few months ago. >> <https://bsd-hardware.info/?id=3Dpci:1002-6841-103c-17a9>; AMD Thames = [Radeon HD 7550M/7570M/7650M] >=20 >=20 >=20 > For example old RS880 [Radeon HD 4200]. After deprecation of = graphics/drm-fbsd12.0-kmod I found that it is still supported fine on = 12-STABLE with legacy /boot/kernel/radeonkms.ko from the base. While = trying the driver from graphics/drm-fbsd12.0-kmod I was not able to use = this card with gdm, only startx or x11/slim worked. On 13-ALPHA this = card still works fine with deprecated graphics/drm-legacy-kmod. >=20 >=20 Does gdm start X in specific way? I mean, afaik, gdm is X11 client as = any other, so the question would be, how does gdm get Xorg started, what = is different compared to startx etc? Might it be about gdm user = permissions to access drm devices? my 2cents.. toomas=
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