Alas! I spoke to seen. The seeming "workaround" only lasted for one
boot, and after that, the ~180 seconds delay is back to stay, although
the Intel IOMMU is still disabled.
So this issue is "sporadic". Maybe even a race condition... :(
And maybe not even related to the intel-lpss driver: The line:
"intel-lpss 0000:00:15.0: enabling device (0000 -> 0002)"
seems to come from drivers/pci/setup-res.c:
if (cmd != old_cmd) {
dev_info(&dev->dev, "enabling device (%04x -> %04x)\n",
old_cmd, cmd);
pci_write_config_word(dev, PCI_COMMAND, cmd);
}
So it just enables the PCI device, which at some point leads to
drivers/mfd/intel-lpss.c#intel_lpss_probe() being called which requests
the DMA module leading to drivers/dma/idma64.c#idma64_probe() being
called which finally outputs:
dev_info(chip->dev, "Found Intel integrated DMA 64-bit\n");
So a lot of code between these two log lines:
[ 6.439056] intel-lpss 0000:00:15.0: enabling device (0000 -> 0002)
[ 187.141427] idma64 idma64.0: Found Intel integrated DMA 64-bit
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1973167
Title:
linux-image-4.15.0-177-generic freezes on the welcome screen
Status in linux package in Ubuntu:
Confirmed
Bug description:
After updating to linux-image-4.15.0-177-generic, my machine
completely freezes on the Ubuntu Welcome screen, i.e. right after
switching to GUI mode. The mouse pointer is frozen, the keyboard does
not even respond to CAPS LOCK or NUM LOCK, pressing CTRL+ALT+F2 shows
no reaction.
I cannot work with my machine at this point and have to hard reset it.
Selecting advanced boot options in grub and selecting the previous
linux kernel 4.15.0-176 makes it work again. So this bad bug was
introduced with the 4.15.0-177 kernel release.
I tried removing the nvidia-driver-510 package, presumably making
Ubuntu use the "nouveau" driver, and with that, I could use the
welcome screen and log in, but the machine still froze shortly
afterwards.
So maybe this is some sort of interference with my GeForce 1080
graphics card, but it is not specific to the driver used.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-177-generic:amd64 4.15.0-177.186
ProcVersionSignature: Ubuntu 4.15.0-176.185-generic 4.15.18
Uname: Linux 4.15.0-176-generic x86_64
NonfreeKernelModules: nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: robert 2082 F.... pulseaudio
/dev/snd/controlC0: robert 2082 F.... pulseaudio
/dev/snd/controlC2: robert 2082 F.... pulseaudio
CurrentDesktop: Unity:Unity7:ubuntu
Date: Thu May 12 13:36:28 2022
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-10-29 (2386 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Supermicro Super Server
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-176-generic
root=UUID=7c296e4d-0189-43a0-aef8-7d536b98a536 ro
RelatedPackageVersions:
linux-restricted-modules-4.15.0-176-generic N/A
linux-backports-modules-4.15.0-176-generic N/A
linux-firmware 1.173.21
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to bionic on 2019-07-29 (1017 days ago)
dmi.bios.date: 09/18/2020
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3.4
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: X11SAE
dmi.board.vendor: Supermicro
dmi.board.version: 1.01
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 17
dmi.chassis.vendor: Supermicro
dmi.chassis.version: 0123456789
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr3.4:bd09/18/2020:svnSupermicro:pnSuperServer:pvr0123456789:rvnSupermicro:rnX11SAE:rvr1.01:cvnSupermicro:ct17:cvr0123456789:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: Super Server
dmi.product.version: 0123456789
dmi.sys.vendor: Supermicro
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