Core Ultra 7 265K - Linux - Debian - Drivers

[Seion]

I am troubleshooting some Plex Buffering issues that I am having on my machine. I am getting buffering when doing hardware decoding/encoding about every 30 - 60 seconds with a 4K movie. I have hardwired 2.5Gb ethernet on the lan so I don't think its a network issue.

Hardware:
CPU: Core Ultra 7 - 265K
Motherboard: MAG Z890 TOMAHAWK WIFI (Updated to latest BIOS)
Memory: 93GB
Storage: SAS3 ZPool Setup
OS: Debian Trixie (Updated to latest packages and kernel) ( Kernel 6.12.12 ) (Headless, no GUI)

Plex does use HW Accel, but I am curious if its using the i915 driver and not using the hardware efficiently.

➜ ~ lspci -knn

...

00:02.0 VGA compatible controller [0300]: Intel Corporation Arrow Lake-S [Intel Graphics] [8086:7d67] (rev 06)
DeviceName: Onboard - Video
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:7e32]
Kernel driver in use: i915
Kernel modules: i915, xe

...

Is there a way to have it use the xe, xe2 drivers? Any thoughts on my issue.

[Seion · Accepted solution]

➜ build git:(master) ./clpeak

Platform: Intel(R) OpenCL Graphics
Device: Intel(R) Graphics
Driver version : 24.52.32224 (Linux x64)
Compute units : 64
Clock frequency : 2000 MHz

Global memory bandwidth (GBPS)
float : 72.45
float2 : 85.96
float4 : 88.06
float8 : 88.77
float16 : 84.40

Single-precision compute (GFLOPS)
float : 2040.47
float2 : 2028.54
float4 : 2033.45
float8 : 2021.79
float16 : 1916.27

Half-precision compute (GFLOPS)
half : 4047.00
half2 : 4013.07
half4 : 4040.80
half8 : 4010.63
half16 : 3966.11

Double-precision compute (GFLOPS)
double : 63.86
double2 : 62.86
double4 : 63.57
double8 : 63.06
double16 : 61.98

Integer compute (GIOPS)
int : 677.96
int2 : 676.72
int4 : 676.61
int8 : 672.46
int16 : 667.87

Integer compute Fast 24bit (GIOPS)
int : 677.96
int2 : 676.71
int4 : 676.49
int8 : 672.54
int16 : 667.82

Integer char (8bit) compute (GIOPS)
char : 1344.80
char2 : 1335.93
char4 : 1328.14
char8 : 1305.81
char16 : 1258.51

Integer short (16bit) compute (GIOPS)
short : 3935.39
short2 : 3909.45
short4 : 3922.06
short8 : 3893.73
short16 : 3811.73

Transfer bandwidth (GBPS)
enqueueWriteBuffer : 35.04
enqueueReadBuffer : 34.06
enqueueWriteBuffer non-blocking : 41.82
enqueueReadBuffer non-blocking : 40.64
enqueueMapBuffer(for read) : 32.86
memcpy from mapped ptr : 26.61
enqueueUnmap(after write) : 39.14
memcpy to mapped ptr : 27.34

Kernel launch latency : 44.18 us

[DeancR_Intel]

Hi Seion,

Thank you for posting in the Community!

I appreciate your response and effort for providing this information that might help on troubleshooting. I would like to ask if this is working well before? Is the issue occurred with some changes on the system (like OS or Drivers updates)?

Best regards,

Dean R.

Intel Customer Support Technician

[Seion]

New CPU / New Debian Install / Never working

[ArielP_Intel]

Hello Seion,

Thank you for providing this information and responding to the previous questions. Let me check this internally and get back to you as soon as possible.

Best regards,

Ariel P.

Intel Customer Support Technician

[DeancR_Intel]

Hi Seion,

I appreciate your patience for waiting on the update. The "i915 driver" is a kernel driver within Linux that specifically manages and controls the graphics hardware on Intel integrated graphics chipsets. Since this is not entirely within my scope, I would recommend referring you to Linux support for further assistance.

While I can provide some troubleshooting steps for Windows, diagnosing issues on Linux can be more challenging. You mentioned it's not a network issue, but it's important to check the Remote Streaming Quality in Plex settings, especially since you are using a 2.5Gb Ethernet connection. Additionally, please verify if this issue occurs with specific apps or all apps that stream in 4K, including websites.

If you have any other questions or need further assistance, please let me know.

Best regards,

Dean R.

Intel Customer Support Technician

[DeancR_Intel]

Hi Seion,

I just wanted to check in with you about my previous message regarding your inquiry. Have you had a chance to take a look at it? If there's anything you're unsure about or if you need more information, please feel free to reach out.

Best regards,

Dean R.

Intel Customer Support Technician

[DeancR_Intel]

Hi Seion,

Since I have not heard from you, I will be closing this thread and no longer be monitored. If you wish to continue with the troubleshooting, please feel free to contact Intel Customer Support or create a new thread. We are eager to hear your feedback on the troubleshooting steps we've suggested. 

Best regards,

Dean R.

Intel Customer Support Technician