Date: Fri, 03 Jan 2025 16:40:50 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 283815] listing dev.vgapci.X.%iommu hangs indefinitely on NVIDIA card Message-ID: <bug-283815-227-i7Npe0bFtA@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-283815-227@https.bugs.freebsd.org/bugzilla/> References: <bug-283815-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D283815 Anton Saietskii <vsasjason@gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|listing sysctl hangs |listing dev.vgapci.X.%iommu |indefinitely on |hangs indefinitely on |dev.vgapci.X while it's |NVIDIA card |NVIDIA card | --- Comment #3 from Anton Saietskii <vsasjason@gmail.com> --- Narrowed down the issue to a single OID. I have the following GPU: vgapci0@pci0:1:0:0: class=3D0x030000 rev=3D0xa1 hdr=3D0x00 vendor=3D0x1= 0de device=3D0x1bb7 subvendor=3D0x1028 subdevice=3D0x07b1 vendor =3D 'NVIDIA Corporation' device =3D 'GP104GLM [Quadro P4000 Mobile]' class =3D display subclass =3D VGA cap 01[60] =3D powerspec 3 supports D0 D3 current D0 cap 05[68] =3D MSI supports 1 message, 64 bit cap 10[78] =3D PCI-Express 2 legacy endpoint max data 256(256) RO NS max read 512 link x16(x16) speed 8.0(8.0) ASPM L0s/L1(L0s/L1) ClockPM disabled ecap 0002[100] =3D VC 1 max VC0 ecap 0018[250] =3D LTR 1 ecap 0004[128] =3D Power Budgeting 1 ecap 0001[420] =3D AER 2 0 fatal 0 non-fatal 1 corrected ecap 000b[600] =3D Vendor [1] ID 0001 Rev 1 Length 36 0b 00 01 90 01 00 41 02 02 00 41 01 01 18 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ecap 0019[900] =3D PCIe Sec 1 lane errors 0 It's unused in my system, so being turned off by sysutils/acpi_call and xmj= @'s turn_off_gpu.sh from TuningPowerConsumption [0]: vgapci0@pci0:1:0:0: class=3D0x030000 rev=3D0xa1 hdr=3D0x00 vendor=3D0x1= 0de device=3D0x1bb7 subvendor=3D0x1028 subdevice=3D0x07b1 vendor =3D 'NVIDIA Corporation' device =3D 'GP104GLM [Quadro P4000 Mobile]' class =3D display subclass =3D VGA (With '\_SB.PCI0.PEG0.PEGP._OFF' method.) After NVIDIA turned off, any sysctl call which tries to get dev.vgapci.X.%i= ommu hangs. Getting other OIDs, e.g. dev.vgapci.0.%driver, works fine. NOTE: this isn't DRM issue as I don't have any NVIDIA-related modules loade= d. [0]: https://wiki.freebsd.org/TuningPowerConsumption --=20 You are receiving this mail because: You are the assignee for the bug.=
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