Chapter 24 Frame Buffer Test (fbtest)

fbtest is a generic test for all dumb frame buffers used with the Solaris 2.x and Solaris 7 software.

The fbtest checks the frame buffer by sequentially writing, reading, and verifying small blocks of random patterns across the entire video RAM. The block size is 64 x 64 pixels. If a miscompare occurs, the test stops with an error message that indicates the location of the error.

If a generic frame buffer device name (dvc/fb) is specified, fbtest automatically detects the depth of the frame buffer, and adjusts testing to the frame buffer size.

For full instructions on testing frame buffers, see "Testing Frame Buffers".

fbtest Options

To reach the dialog box below, right-click on the test name in the System Map and select Test Parameter Options. If you do not see this test in the System Map, you might need to expand the collapsed groups, or your system may not include the device appropriate to this test. Refer to the SunVTS User's Guide for more details.

Figure 24-1 fbtest Test Parameter Options Dialog Box

---

Note -

To start SunVTS with vtsui, but without vtsk, you must add the host name to xhost as: xhost + hostname.

---

fbtest Test Modes

Due to the nature of graphic tests, reading from or writing to the frame buffer during graphic tests disturbs user operation.

Table 24-1 fbtest Test Modes

Test Mode	Supported?	Description
Connection	No	Not supported
Functional  (Offline)	Yes	Runs the full set of tests

fbtest Command-Line Syntax

/opt/SUNWvts/bin/fbtest standard_arguments -o dev=device_name, lock=E(nable)/D(isable)

Table 24-2 fbtest Command-Line Syntax

Argument	Description
dev=device_name	Specifies which frame buffer to test.
lock=E(nable)/D(isable)	Enables or disables the window system locking option. See "Testing Frame Buffers" for details. Frame buffer locking is enabled by default on the window server running the Open Windows software.

---

Note -

64-bit tests are located in the sparcv9 subdirectory: /opt/SUNWvts/bin/sparcv9/testname. If a test is not present in this directory, then it may only be available as a 32-bit. For more information refer to "32-Bit and 64-Bit Tests".

---