Date: Mon, 13 Apr 2020 12:45:38 +0200 From: Niclas Zeising <zeising@freebsd.org> To: Andrea Venturoli <ml@netfence.it>, x11@FreeBSD.org Subject: Re: Users of x11-drivers/xf86-video-ati-legacy Message-ID: <dc23b150-39c1-f875-2ee1-d38c919f498d@freebsd.org> In-Reply-To: <0c34355a-9f91-a966-7e46-aefcd2806fbd@netfence.it> References: <ef0ba8bc-e029-1918-5747-941fd9a3f2ae@freebsd.org> <16c93a1a-cc60-b9a5-da48-889f48aa6005@netfence.it> <d1133d52-0edd-aeae-afc0-32c4339c99b0@netfence.it> <c36ed3ba-1aad-ad70-1f90-1fa1f9370b59@netfence.it> <9352b468-9f09-ad30-0b9e-acd896cadb17@freebsd.org> <0c34355a-9f91-a966-7e46-aefcd2806fbd@netfence.it>
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On 2020-04-13 11:42, Andrea Venturoli wrote: > On 2020-04-13 09:29, Niclas Zeising wrote: >=20 >> Thank you for helping out and testing, unfortunately there is not much= =20 >> to do if it does not work. >=20 > Thanks to you. >=20 >=20 >=20 >> I don't have the time or hardware to get an older xf86-video-ati to=20 >> maybe build with xserver 1.20. >=20 > I'm now back to xserver 1.19. > I can easily switch back and forth, so if you want me to do some test,=20 > just ask. > In fact, I'd be interested in making this work, but I need some=20 > guidance; I can use gdb & Co, but I know almost nothing of X internals. I don't know exactly what makes xf86-video-ati-legacy crash, but if you=20 want to get it working, I think that the best course of action is to=20 move it back to 7.9, and then try to backport just as much as needed to=20 get it to compile with xserver 1.20, but still work on drm-legacy-kmod.=20 That's what I tried to do, but unfortunately I probably brought back too=20 much, which caused it to break. >=20 >=20 >=20 >> The reason xf86-video-ati-legacy works with drm-fbsd12.0-kmod is that=20 >> the updated kmod uses newer APIs etc. >=20 > You mean the reason *it doesn't* work? Yes, of course. Sorry about that. >=20 >=20 >=20 >> =C2=A0 At one point, xf86-video-ati was updated to make these work, an= d=20 >> when we updated xf86-video-ati in ports to the latest version to get=20 >> support for more modern hardware,we had to create=20 >> xf86-video-ati-legacy for use with drm-legacy-kmod.=C2=A0 This was alw= ays=20 >> one of those stop-gap measures. >=20 > Ok. > Problem is xf86-video-ati-legacy + drm-kmod-legacy works no more with=20 > Xorg 1.20. > And, more relevantly, on my HD4250 drm-12-kmod only works partially. > And, even with those limiations, X often hangs. >=20 > Strange, because I also have a HD4200 which used to work prefectly with= =20 > non-legacy; I had to switch to legacy when I moved to HD4250. > They should be almost the same card, just with different clocks. Graphics cards, even in the same series, can be quite different,=20 unfortunately. This is one of the reasons this work is so hard, because=20 even if one adapter in a family works, it does not mean all of them does. Looking quickly at wikipedia [1], it looks like the HD4200 card uses the=20 785G chipset, but HD4250 uses 880G (a generation later, as I understand=20 it), meaning they are probably quite different. Yes, this is super=20 confusing. [1] https://en.wikipedia.org/wiki/Radeon_HD_4000_series#IGP_(HD_4000) Regards --=20 Niclas Zeising
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