Wikis > Uniaud > Debugging

Debugging the Uniaud drivers

This page lists some of the common problems with the Uniaud drivers and how to resolve them.

If you open a ticket, additional information will almost always be necessary. You can save a lot of time by always attaching the log file created by the TestLog program to your ticket when you open it, rather than waiting for the developer to ask for it.

Known Problems and Limitations

  • In version 3.01.xx, sound does not work after a warm boot on a ThinkPad T60. Sound works fine after a cold boot. If this bothers you simply install an older version.
  • Playing more than one audio stream at the same time may crash the driver.
  • If you are using ACPI.PSD, you must have version 3.20.01 or later. Uniaud32 will not work with ACPI.PSD versions older than 3.20.01. If you are using Uniaud32 version 2.02.04 then ACPI.PSD version 3.23.04 or later is required.
  • Some systems have more than one audio adapter, some of which may not work. Uniaud32 always tries to initialize all the adapters in the system, but only selects the first one to use. This can be wasteful on system resources and may not choose the desired adapter. If your system has more then one audio adapter, you may need to use the /A switch to select which adapter Uniaud32 should use. The first adapter is selected with /A:0, the second with /A:1, etc. Simply add the switch to the uniaud32 line in your config.sys. For example:
  • Most problems with Uniaud are incorrect mixer settings. Use a mixer application (or unimix) to check and set the mixer switches and volume settings appropriately for your system.

There may be newer experimental builds on our Experimental Builds page.

Capturing a TestLog log file

If you don’t already have the current version of the TestLog program, you can download it here: Get TestLog

Open a command window and execute the testlog command:

testlog uniaud

Attach the created log file to your ticket. Do not ZIP the log file.

Real Time Logs

You can see the log output in real time by connecting a terminal or second system to the serial port.

Enable the serial output by adding the “/P:1” or the “/P:2” switch to Uniaud32.sys in your config.sys. /P:1 specifies to use serial port 1, and /P:2 specifies to use serial port 2.


Set the serial port baud rate to 115200, 8 bits, no parity.

mode com1:115200,n,8,1

This entry last updated: by David Azarewicz