On Thu, Jan 28, 2021 at 04:56:26PM -0800, Marc MERLIN wrote: > On Wed, Jan 27, 2021 at 03:33:00PM -0600, Bjorn Helgaas wrote: > > Hi Marc, I appreciate your persistence on this. I am frankly > > surprised that you've put up with this so long. > > Well, been using linux for 27 years, but also it's not like I have much > of a choice outside of switching to windows, as tempting as it's getting > sometimes ;) > > > > after boot, when it gets the right trigger (not sure which ones), it > > > loops on this evern 2 seconds, mostly forever. > > > > > > I'm not sure if it's nouveau's fault or the kernel's PCI PME's fault, or something else. > > > > IIUC there are basically two problems: > > > > 1) A 2 minute delay during boot > > Another random thought: is there any chance the boot delay could be > > related to crypto waiting for entropy? > > So, the 2mn hang went away after I added the nouveau firwmare in initrd. > The only problem is that the nouveau driver does not give a very good > clue as to what's going on and what to do. > > For comparison the intel iwlwifi driver is very clear about firmware > it's trying to load, if it can't and what exact firmware you need to > find on the internet (filename) I guess you're referring to this in iwl_request_firmware()? IWL_ERR(drv, "check git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git\n"); How can we fix this in nouveau so we don't have the debug this again? I don't really know how firmware loading works, but "git grep -A5 request_firmware drivers/gpu/drm/nouveau/" shows that we generally print something when request_firmware() fails. But I didn't notice those messages in your logs, so I'm probably barking up the wrong tree. > > 2) Some sort of event every 2 seconds that kills your battery life > > Your machine doesn't sound unusual, and I haven't seen a flood of > > similar reports, so maybe there's something unusual about your config. > > But I really don't have any guesses for either one. > > Honestly, there are not too many thinpad P73 running linux out there. I > wouldn't be surprised if it's only a handful or two. > > > It sounds like v5.5 worked fine and you first noticed the slow boot > > problem in v5.8. We *could* try to bisect it, but I know that's a lot > > of work on your part. > > I've done that in the past, to be honest now that it works after I added > the firmware that nouveau started needing, and didn't need before, the > hang at boot is gone for sure. > The PCI PM wakeup issues on batteries happen sometimes still, but they > are much more rare now. So maybe the wakeups are related to having vs not having the nouveau firmware? I'm still curious about that, and it smells like a bug to me, but probably something to do with nouveau where I have no hope of debugging it. > > Grasping for any ideas for the boot delay; could you boot with > > "initcall_debug" and collect your "lsmod" output? I notice async_tx > > in some of your logs, but I have no idea what it is. It's from > > crypto, so possibly somewhat unusual? > > Is this still neeeded? I think of nouveau does a better job of helping > the user correct the issue if firmware is missing (I think intel even > gives a URL in printk), that would probably be what's needed for the > most part. Nope, don't bother with this, thanks. Bjorn
