On Sat, Dec 26, 2020 at 03:12:09AM -0800, Ilia Mirkin wrote: > > after boot, when it gets the right trigger (not sure which ones), it > > loops on this evern 2 seconds, mostly forever. > > The gpu suspends with runtime pm. And then gets woken up for some > reason (could be something quite silly, like lspci, or could be > something explicitly checking connectors, etc). Repeat. Ah, fair point. Could it be powertop even? How would I go towards tracing that? Sounds like this would be a problem with all chips if userspace is able to wake them up every second or two with a probe. Now I wonder what broken userspace I have that could be doing this. > Display offload usually requires acceleration -- the copies are done > using the DMA engine. Please make sure that you have firmware > available (and a new enough mesa). The errors suggest that you don't > have firmware available at the time that nouveau loads. Depending on > your setup, that might mean the firmware has to be built into the > kernel, or available in initramfs. (Or just regular filesystem if you > don't use a complicated boot sequence. But many people go with distro > defaults, which do have this complexity.) Hi Ilia, thanks for your answer. Do you think that could be a reason why the boot would hang for 2 full minutes at every boot ever since I upgraded to 5.5? Also, without wanting to sound like a full newbie, where is that firmware you're talking about? In my kernel source? Here's what I do have: sauron:/usr/local/bin# dpkggrep nouveau libdrm-nouveau2:amd64 install xserver-xorg-video-nouveau install no nouveau-firmware package in debian: sauron:/usr/local/bin# apt-cache search nouveau bumblebee - NVIDIA Optimus support for Linux libdrm-nouveau2 - Userspace interface to nouveau-specific kernel DRM services -- runtime xfonts-jmk - Jim Knoble's character-cell fonts for X xserver-xorg-video-nouveau - X.Org X server -- Nouveau display driver No firmware file on my disk: sauron:/usr/local/bin# find /lib/modules/5.9.11-amd64-preempt-sysrq-20190817/ /lib/firmware/ |grep nouveau /lib/modules/5.9.11-amd64-preempt-sysrq-20190817/kernel/drivers/gpu/drm/nouveau /lib/modules/5.9.11-amd64-preempt-sysrq-20190817/kernel/drivers/gpu/drm/nouveau/nouveau.ko sauron:/usr/local/bin# The kernel module is in my initrd: sauron:/usr/local/bin# dd if=/boot/initrd.img-5.9.11-amd64-preempt-sysrq-20190817 bs=2966528 skip=1 | gunzip | cpio -tdv | grep nouveau drwxr-xr-x 1 root root 0 Nov 30 15:40 usr/lib/modules/5.9.11-amd64-preempt-sysrq-20190817/kernel/drivers/gpu/drm/nouveau -rw-r--r-- 1 root root 3691385 Nov 30 15:35 usr/lib/modules/5.9.11-amd64-preempt-sysrq-20190817/kernel/drivers/gpu/drm/nouveau/nouveau.ko 17+1 records in 17+1 records out 52566778 bytes (53 MB, 50 MiB) copied, 1.69708 s, 31.0 MB/s What am I supposed to do/check next? Note that ultimately I only need nouveau not to hang my boot 2mn and do PM so that the nvidia chip goes to sleep since I don't use it. Thanks, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Home page: http://marc.merlins.org/ | PGP 7F55D5F27AAF9D08
