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