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Recent content by B-M

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High DPC latency (ACPI.sys) on a new XPS 15 (clean install)

Sorry for my late reply. The option to roll back the driver is greyed out. I imagine because before WU downloaded the precision driver, there was no real driver installed. While I could use the touchpad for moving the cursor and maybe tapping (I don't remeber for sure), scrolling didn't work...
- B-M
- Post #7
- May 29, 2022
- Forum: Windows 11
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High DPC latency (ACPI.sys) on a new XPS 15 (clean install)

Update: I noticed that the spikes seem to happen while using the touchpad. So I connected a Bluetooth mouse and disabled the touchpad in device manager. Now the highest DPC is ntoskrnl.exe with just under 0,9 ms. APCI.exe is down to 0,4ms. Not great overall (my old Dell with an 6820HQ managed...
- B-M
- Post #5
- May 26, 2022
- Forum: Windows 11
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High DPC latency (ACPI.sys) on a new XPS 15 (clean install)

Ok, it seems that whenever I start LatencyMon while xperf is running, I get this error message. So I captured a trace without running LatencyMon. Trace: trace.zip Sysnative BSOD Collection: SysnativeFileCollectionApp.zip Speccy: http://speccy.piriform.com/results/pPKogrDIIKhTxDbJNrMbccK
- B-M
- Post #4
- May 24, 2022
- Forum: Windows 11
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High DPC latency (ACPI.sys) on a new XPS 15 (clean install)

Thank you for your reply. I tried this, but when attempting to stop the trace with xperf -d "%userprofile%\Desktop\trace.etl" I get the following error message: xperf: error: NT Kernel Logger: The instance name passed was not recognized as valid by a WMI data provider. (0x1069).
- B-M
- Post #3
- May 24, 2022
- Forum: Windows 11
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High DPC latency (ACPI.sys) on a new XPS 15 (clean install)

Hello I got a new XPS 15 9520, and am experiencing high DPC latencies caused by ACPI.sys (1.5 - 2.5 ms, checking with Latency Mon). I did a clean Win11 install. Right after the install, the numbers look ok, but then Windows Update starts to install drivers and the latency goes up. Bios is up...
- B-M
- Thread
- May 24, 2022
- Replies: 6
- Forum: Windows 11

Recent content by B-M

High DPC latency (ACPI.sys) on a new XPS 15 (clean install)

High DPC latency (ACPI.sys) on a new XPS 15 (clean install)

High DPC latency (ACPI.sys) on a new XPS 15 (clean install)

High DPC latency (ACPI.sys) on a new XPS 15 (clean install)

High DPC latency (ACPI.sys) on a new XPS 15 (clean install)