10:11 Aison: re
10:12 Aison: maybe somebody answered my question concerning mst & amdgpu & kernel 6.1 from yesterday?
10:35 Aison: -> is mst still supported in kernel 6.1? in kernel 6.0 and prior I used radeon.mst=1 and then dp daisychain worked
11:42 _ds_: Aison, I would expect that it's still supported but that some change has broken things for you ⇒ a bug report would be the way forward. OTOH, “radeon.mst” – no good if using amdgpu…
12:04 towo`: maybe related: https://www.phoronix.com/news/DRM-Misc-Next-6.1-Old-DP-MST
12:41 mvchtz: g
13:47 Aison: _ds_, towo` thx, it looks like this code was removed in kernel 6.1, just looked into it
13:48 Aison: I wounder how to enable to modern DP MST code...
13:49 Aison: I guess some kernel config or kernel command line option has to be enabled/set
13:50 Ristovski: Aison: Which GPU?
13:51 Aison: Vega64
13:51 Aison: with 4 Screens connected via DP daisychain
13:52 Aison: until kernel 6.0 it worked, since kernel 6.1 only zhr first screen works
13:52 Ristovski: Aison: And you are using it with the `amdgpu` driver as opposed to `radeon`, right?
13:52 Ristovski: (given that the "legacy" DP MST got removed in radeon in 6.1)
13:52 Aison: Ristovski, lsmod says so. amdgpu is loaded, bu t not radeon
13:54 Aison: no idea why, but this kernel option also affected amdgpu. When I removed it, then only one screen worked
13:54 Ristovski: Hmm, not sure why it's not working, I am at lest not seeing anything MST related in `modinfo amdgpu`
13:55 Aison: just see that I only compiled amdgpu in the kernel
13:55 Aison: so using radeon driver was not even possible
13:58 Aison: Also AMD DC is enabled (enable new display engine)
13:58 Aison: ?
14:04 Remco: https://gitlab.freedesktop.org/drm/amd/-/issues/2171 <= first comment has debug flags, perhaps that can help?
14:05 Remco: Also if you can, try 6.2-rc6 or newer (see last comment)
14:22 Aison0: ok
17:33 Venemo: Ristovski: the old radeon driver doesn't support his GPU
19:46 Ristovski: Venemo: Oh I know, my question was more in line whether he had amdgpu disabled and thus it would have been falling back to generic vesa etc
19:46 Ristovski: but then I guess that can't do DP MST either lol :P
20:00 Aison: Ristovski, Remco, towo` with latest git kernel version mst is working again
20:00 Ristovski: Nice ;)