| rinwolf[m] | hello! I'm a kubuntu user (currently on 21.10) and have been running into some issues when booting from the lowlatency kernel installed by ubuntustudio-installer | 16:58 |
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| MauroGaspari[m] | <rinwolf[m]> "hello! I'm a kubuntu user (..." <- Hi! what isssue did you encounter? | 17:07 |
| rinwolf[m] | MauroGaspari[m]: I can boot into my generic kernel, but whenever I use the lowlatency one I lose video signal | 17:08 |
| MauroGaspari[m] | rinwolf[m]: does this happen every single time, or is this random? | 17:10 |
| rinwolf[m] | MauroGaspari[m]: consistently, I can't log in with that kernel. Just get a black screen. I have to boot with the generic one | 17:11 |
| MauroGaspari[m] | I noticed some issues during boot with AMD, and if I remember well, those were mitigated if not resolved by disabling IOMMU on the bios, at least for some users. | 17:11 |
| MauroGaspari[m] | rinwolf: but if you can consistently reproduce it, I believe that filing a bug report could be very useful. | 17:12 |
| rinwolf[m] | I can try disabling that! And I'll make sure to fill out a bug report. | 17:12 |
| rinwolf[m] | I'll reboot and see how that goes. I appreciate the advice :) | 17:12 |
| MauroGaspari[m] | Yeah, it would be useful to know if disabling IOMMU helps a bit | 17:12 |
| MauroGaspari[m] | rinwolf: thanks, please follow up with us. | 17:13 |
| Eickmeyer[m] | Mauro Gaspari, rinwolf : Not likely a bug with the lowlatency kernel (which is only about 3 build flags different from the generic kernel). What you're experiencing is a condition where, if one installs video drivers (e.g. nvidia) they don't build for every kernel flavor. The way to mitigate this is to run "sudo dkms autoinstall" followed by "sudo update-initramfs -uk all". | 18:32 |
| Eickmeyer[m] | Sorry, "dkms autoinstall --all". | 18:33 |
| Eickmeyer[m] | This typically happens when a kernel flavor is installed after video drivers have already been installed. | 18:33 |
| MauroGaspari[m] | Eickmeyer @eickmeyer:matrix.org: and that is why we typically don't see it on ubuntu studio, but on other flavors that add the lowlatency kernel later? | 18:37 |
| Eickmeyer[m] | Mauro Gaspari: Exactly. | 18:37 |
| Eickmeyer[m] | It's basically a race condition that nothing can account for. | 18:39 |
| MauroGaspari[m] | Got it, thanks Eickmeyer @eickmeyer:matrix.org however on my amd desktop, disabling IOMMU did help a lot avoiding lockups at boot. Just fyi | 18:40 |
| MauroGaspari[m] | No issues on my intel plus nvidia laptop, funny as it might seem that one runs flawlessly | 18:41 |
| Eickmeyer[m] | Mauro Gaspari: The difference between nvidia and amd graphics is profound. AMD actually works with the kernel developers to make sure the drivers are in the kernel, and nvidia is 100% propretary and must be installed later. Noveau is a reverse-engineered crutch with such grapics. | 18:42 |
| rinwolf[m] | <Eickmeyer[m]> "Mauro Gaspari, rinwolf : Not..." <- yeah so I just spent over 30 minutes trying to keep my OS from freezing after going into a bunch of issues with NVIDIA drivers. So this has been an adventure | 18:51 |
| rinwolf[m] | I successfully removed proprietary drivers on my system, but now the lowlatency kernel freezes whenever I get to my desktop | 18:52 |
| Eickmeyer[m] | rinwolf: There's a ton of other reasons why that might be happening, but the lowlatency kernel is not developed by this team. | 18:53 |
| rinwolf[m] | yeah, I think at this point I'm going to just remove that. kubuntu was very stable on its own until I used the ubuntu studio installer | 18:53 |
| Eickmeyer[m] | Well, if you really want to, Ubuntu Studio is Kubuntu 21.10 with the additional Ubuntu Studio stuff added on out of the box, so not sure why you're going the Kubuntu + USI rout. | 18:54 |
| Eickmeyer[m] | *route | 18:54 |
| rinwolf[m] | I already had it installed and didn't want to do a full reinstall of my OS | 18:55 |
| rinwolf[m] | also, why is the installer even offered if its that much of an issue? I ran it through the terminal | 18:55 |
| Eickmeyer[m] | Ok, but remember: it doesn't convert your system magically into Ubuntu Studio. Your primary support is still in #kubuntu:libera.chat | 18:55 |
| Eickmeyer[m] | I'd suggest getting ahold of TJ- in #ubuntu:libera.chat since he's very much an expert on the lowlatency kernel. | 18:58 |
| rinwolf[m] | okay, well at this point I'll just stick with a second partition in LTS studio and just not deal with this. I know kubuntu is fine on its own, but there wasn't a disclaimer about kernel issues on the page where it suggests the installer program | 18:58 |
| Eickmeyer[m] | rinwolf: The kernel isn't Ubuntu Studio specific, not even the Lowlatency kernel. There's nothing really that special about it. We just happen to have it by default. | 18:59 |
| Eickmeyer[m] | So, I'd suggest getting ahold of TJ- since he knows way more about it than we do. | 18:59 |
| rinwolf[m] | I should rephrase that- this issue is the result of using the installer | 18:59 |
| rinwolf[m] | I really just don't want to break my system right now, I'm also in school and do a lot of my coursework on here 😬 | 19:00 |
| Eickmeyer[m] | I understand, but I'm just trying to help you get the proper help since we don't exactly have that here. | 19:00 |
| rinwolf[m] | I do appreciate that | 19:00 |
| Eickmeyer[m] | Basically, it's a little early to be giving up on it. Find TJ-, and the #ubuntu:libera.chat room does support all offiicial flavors of Ubuntu equally. | 19:02 |
| Eickmeyer[m] | We would here too (as would all flavor chats), but we lack manpower and attention. | 19:03 |
| tomreyn | my (very rough) bet would be more on the nvidia domain than anything else, but that, too, would be better directed to #ubuntu | 19:24 |
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