2nd monitor doesn't work anymore after kernel update

[cicciocappuccio]

after the update of kerne the system doesn't detect anymore the 2nd display.

The monitor works fine and also the display port works, I tried with windows os that I have on the same machine.

Running lspci the result on the 2 kernel versions are:
OLD kernel (5.15.0-210.163.7.el9uek.x86_64):

`[XXX.YYY@N2852 ~]$ lspci -vnn | grep VGA -A 12
00:02.0 VGA compatible controller [0300]: Intel Corporation TigerLake-H GT1 [UHD Graphics] [8086:9a60] (rev 01) (prog-if 00 [VGA controller])
DeviceName: Onboard IGD
Subsystem: Hewlett-Packard Company Device [103c:8870]
Flags: bus master, fast devsel, latency 0, IRQ 151, IOMMU group 2
Memory at 6052000000 (64-bit, non-prefetchable) [size=16M]
Memory at 4000000000 (64-bit, prefetchable) [size=256M]
I/O ports at 4000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915

00:04.0 Signal processing controller [1180]: Intel Corporation TigerLake-LP Dynamic Tuning Processor Participant [8086:9a03] (rev 05)
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation TU117GLM [T1200 Laptop GPU] [10de:1fbc] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company Device [103c:8870]
Flags: bus master, fast devsel, latency 0, IRQ 150, IOMMU group 17
Memory at 6d000000 (32-bit, non-prefetchable) [size=16M]
Memory at 6040000000 (64-bit, prefetchable) [size=256M]
Memory at 6050000000 (64-bit, prefetchable) [size=32M]
I/O ports at 3000 [size=128]
Expansion ROM at 6e080000 [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: nouveau
Kernel modules: nvidiafb, nouveau

01:00.1 Audio device [0403]: NVIDIA Corporation Device [10de:10fa] (rev a1)
[XXX.YYY@N2852 ~]$ lspci
00:00.0 Host bridge: Intel Corporation 11th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
00:01.0 PCI bridge: Intel Corporation 11th Gen Core Processor PCIe Controller #1 (rev 05)
00:02.0 VGA compatible controller: Intel Corporation TigerLake-H GT1 [UHD Graphics] (rev 01)
00:04.0 Signal processing controller: Intel Corporation TigerLake-LP Dynamic Tuning Processor Participant (rev 05)
00:07.0 PCI bridge: Intel Corporation Tiger Lake-H Thunderbolt 4 PCI Express Root Port #0 (rev 05)
00:07.1 PCI bridge: Intel Corporation Tiger Lake-H Thunderbolt 4 PCI Express Root Port #1 (rev 05)
00:08.0 System peripheral: Intel Corporation GNA Scoring Accelerator module (rev 05)
00:0a.0 Signal processing controller: Intel Corporation Tigerlake Telemetry Aggregator Driver (rev 01)
00:0d.0 USB controller: Intel Corporation Tiger Lake-H Thunderbolt 4 USB Controller (rev 05)
00:0d.2 USB controller: Intel Corporation Tiger Lake-H Thunderbolt 4 NHI #0 (rev 05)
00:12.0 Serial controller: Intel Corporation Tiger Lake-H Integrated Sensor Hub (rev 11)
00:14.0 USB controller: Intel Corporation Tiger Lake-H USB 3.2 Gen 2x1 xHCI Host Controller (rev 11)
00:14.2 RAM memory: Intel Corporation Tiger Lake-H Shared SRAM (rev 11)
00:14.3 Network controller: Intel Corporation Tiger Lake PCH CNVi WiFi (rev 11)
00:15.0 Serial bus controller: Intel Corporation Tiger Lake-H Serial IO I2C Controller #0 (rev 11)
00:16.0 Communication controller: Intel Corporation Tiger Lake-H Management Engine Interface (rev 11)
00:1b.0 PCI bridge: Intel Corporation Tiger Lake-H PCIe Root Port #17 (rev 11)
00:1c.0 PCI bridge: Intel Corporation Tiger Lake-H PCIe Root Port #3 (rev 11)
00:1f.0 ISA bridge: Intel Corporation WM590 LPC/eSPI Controller (rev 11)
00:1f.3 Multimedia audio controller: Intel Corporation Tiger Lake-H HD Audio Controller (rev 11)
00:1f.4 SMBus: Intel Corporation Tiger Lake-H SMBus Controller (rev 11)
00:1f.5 Serial bus controller: Intel Corporation Tiger Lake-H SPI Controller (rev 11)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (14) I219-V (rev 11)
01:00.0 VGA compatible controller: NVIDIA Corporation TU117GLM [T1200 Laptop GPU] (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 10fa (rev a1)
56:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
57:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5261 PCI Express Card Reader (rev 01)
[XXX.YYY@N2852 ~]$`

NEW kernel (5.15.0-300... )

`[XXX.YYY@N2852 ~]$ lspci -vnn | grep VGA -A 12
00:02.0 VGA compatible controller [0300]: Intel Corporation TigerLake-H GT1 [UHD Graphics] [8086:9a60] (rev 01) (prog-if 00 [VGA controller])
    DeviceName: Onboard IGD
    Subsystem: Hewlett-Packard Company Device [103c:8870]
    Flags: bus master, fast devsel, latency 0, IRQ 150, IOMMU group 2
    Memory at 6052000000 (64-bit, non-prefetchable) [size=16M]
    Memory at 4000000000 (64-bit, prefetchable) [size=256M]
    I/O ports at 4000 [size=64]
    Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
    Capabilities: <access denied>
    Kernel driver in use: i915
    Kernel modules: i915

00:04.0 Signal processing controller [1180]: Intel Corporation TigerLake-LP Dynamic Tuning Processor Participant [8086:9a03] (rev 05)
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation TU117GLM [T1200 Laptop GPU] [10de:1fbc] (rev ff) (prog-if ff)
    !!! Unknown header type 7f
    Kernel modules: nvidiafb, nouveau

01:00.1 Audio device [0403]: NVIDIA Corporation Device [10de:10fa] (rev ff) (prog-if ff)
    !!! Unknown header type 7f
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel

56:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983 [144d:a808] (prog-if 02 [NVM Express])
    Subsystem: Samsung Electronics Co Ltd SSD 970 EVO/PRO [144d:a801]
    Flags: bus master, fast devsel, latency 0, IRQ 16, IOMMU group 18
    Memory at 6eb00000 (64-bit, non-prefetchable) [size=16K]
[XXX.YYY@N2852 ~]$ lspci
00:00.0 Host bridge: Intel Corporation 11th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
00:01.0 PCI bridge: Intel Corporation 11th Gen Core Processor PCIe Controller #1 (rev 05)
00:02.0 VGA compatible controller: Intel Corporation TigerLake-H GT1 [UHD Graphics] (rev 01)
00:04.0 Signal processing controller: Intel Corporation TigerLake-LP Dynamic Tuning Processor Participant (rev 05)
00:07.0 PCI bridge: Intel Corporation Tiger Lake-H Thunderbolt 4 PCI Express Root Port #0 (rev 05)
00:07.1 PCI bridge: Intel Corporation Tiger Lake-H Thunderbolt 4 PCI Express Root Port #1 (rev 05)
00:08.0 System peripheral: Intel Corporation GNA Scoring Accelerator module (rev 05)
00:0a.0 Signal processing controller: Intel Corporation Tigerlake Telemetry Aggregator Driver (rev 01)
00:0d.0 USB controller: Intel Corporation Tiger Lake-H Thunderbolt 4 USB Controller (rev 05)
00:0d.2 USB controller: Intel Corporation Tiger Lake-H Thunderbolt 4 NHI #0 (rev 05)
00:12.0 Serial controller: Intel Corporation Tiger Lake-H Integrated Sensor Hub (rev 11)
00:14.0 USB controller: Intel Corporation Tiger Lake-H USB 3.2 Gen 2x1 xHCI Host Controller (rev 11)
00:14.2 RAM memory: Intel Corporation Tiger Lake-H Shared SRAM (rev 11)
00:14.3 Network controller: Intel Corporation Tiger Lake PCH CNVi WiFi (rev 11)
00:15.0 Serial bus controller: Intel Corporation Tiger Lake-H Serial IO I2C Controller #0 (rev 11)
00:16.0 Communication controller: Intel Corporation Tiger Lake-H Management Engine Interface (rev 11)
00:1b.0 PCI bridge: Intel Corporation Tiger Lake-H PCIe Root Port #17 (rev 11)
00:1c.0 PCI bridge: Intel Corporation Tiger Lake-H PCIe Root Port #3 (rev 11)
00:1f.0 ISA bridge: Intel Corporation WM590 LPC/eSPI Controller (rev 11)
00:1f.3 Multimedia audio controller: Intel Corporation Tiger Lake-H HD Audio Controller (rev 11)
00:1f.4 SMBus: Intel Corporation Tiger Lake-H SMBus Controller (rev 11)
00:1f.5 Serial bus controller: Intel Corporation Tiger Lake-H SPI Controller (rev 11)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (14) I219-V (rev 11)
01:00.0 VGA compatible controller: NVIDIA Corporation TU117GLM [T1200 Laptop GPU] (rev ff)
01:00.1 Audio device: NVIDIA Corporation Device 10fa (rev ff)
56:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
57:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5261 PCI Express Card Reader (rev 01)`

the kerenels are:
new version: 5.15.0-300.163.18.1.1.el9uek.x86_64; (where doesn't work)
old version: 5.15.0-210.163.7.el9uek.x86_64 (all fine)

I found this logs with dmesg:

`[    5.184651] pci 0000:01:00.0: optimus capabilities: enabled, status dynamic power, hda bios codec supported
[    5.184654] VGA switcheroo: detected Optimus DSM method \_SB_.PC00.PEG1.PEGP handle
[    5.184655] nouveau: detected PR support, will not use DSM
[    5.184692] nouveau 0000:01:00.0: Unable to change power state from D3cold to D0, device inaccessible
[    5.184766] nouveau 0000:01:00.0: unknown chipset (ffffffff)`

[YoderExMachina]

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[vashanmu]

The message "nouveau 0000:01:00.0: Unable to change power state from D3cold to D0, device inaccessible" tells the power management may not be working with the nouveau driver, can you disable Nvidia-failback.service so that Nvidia driver is loaded instead of nouveau.

[cicciocappuccio]

The message "nouveau 0000:01:00.0: Unable to change power state from D3cold to D0, device inaccessible" tells the power management may not be working with the nouveau driver, can you disable Nvidia-failback.service so that Nvidia driver is loaded instead of nouveau.

thanks in advance

I remember disabling something like this a while back on another machine, but I'm not sure.
I remember running this command:

[xxx.yyy@N2852 ~]$ sudo systemctl disable nvidia-fallback.service
Failed to disable unit: Unit file nvidia-fallback.service does not exist.
[xxx.yyy@N2852 ~]$ 

the result is not encouraging

---

is this (https://docs.nvidia.com/ai-enterprise/deployment/vmware/latest/nouveau.html#rhel) the procedure for do not load nouveau ?

[vashanmu]

Yes, that is the procedure to avoid loading the nouveau driver. Could you gather the sosreport of both working and non working kernel versions.

[cicciocappuccio]

disabling nouveau driver don't resolve.

Last working kernel was 5.15.0-210.163.7.el9uek.x86_64, that I don't have anymore, so, I can provide only sosreport for the current installed kernels.

How can safetly share with you the report? I created it and I saw that it's encrypted