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Linux remote audio device support, SoundBlaster Audigy 4-SB0610 - motherboard

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B Linux remote audio device support As shown in Figure 2-24 RGS audio subsystem on Linux on page 38, an audio device is required to be installed in Linux-based Remote Computers in order for application-generated audio to be sent to the Local Computer. Furthermore, the audio device installed in the Remote Computer must have the ability to record from a control that is the mix of all audio signals. On a Windows computer, by way of comparison, this control is often called "Stereo Mix". Linux, however, does not follow a standard naming convention for this control-hence, the need to evaluate individual audio devices to determine their suitability for use on Linux. RGS will attempt to capture application generated audio from the Sender and playback the result on the Receiver. Not all audio device drivers provide the capability to capture application generated audio. The following list of audio devices are known to work on Redhat EL4 and Redhat EL5: ● SoundBlaster Audigy 4-SB0660 ● SoundBlaster Audigy 4-SB0610 ● SoundBlaster Audigy 2ZS-SB0350 ● SoundBlaster-SB0160 ● SoundBlaster Live!-CT4780 ● SoundBlaster Live!-CT4760 HP Personal Workstations have a high definition audio device on the motherboard. This device is known to use a driver on Redhat EL4 and Redhat EL5 that does not allow RGS to capture application generated audio. The Linux virtual audio driver can be used on systems without audio hardware. In some cases, it may be desirable to disable the physical audio device and install the virtual audio driver. See Linux Sender Audio on page 82 for information on how to install the virtual audio driver. IMPORTANT: The Linux virtual audio driver is the "only" supported audio device for RHEL V6. Hardware audio devices are not supported. NOTE: The Linux virtual audio driver is not supported in a virtual machine. Timing information from the kernel in a virtual machine may not be precise enough to ensure consistent audio quality. 230 Appendix B Linux remote audio device support

Section	Page
Introduction to HP Remote Graphics Software	17
Typical RGS configuration	19
RGS Sender and Receiver	20
RGS features	21
Additional RGS features	22
Tabloid-size page	23
Obtaining HP technical support	23
Software Service Strategy for Non-HP Hardware	23
Other RGS Documents	24
RGS overview	25
Supported computers and operating systems	25
RGS version numbering	28
RGS licensing	28
RGS products	29
Sender and Receiver interoperability	30
Application support	30
Networking support	31
Connection topologies	31
The Remote Computer frame buffer	31
One-to-one connection	32
Many-to-one connection	33
One-to-many connection	34
Establishing an RGS connection using Standard Login	36
Single Sign-on and Easy Login	38
Single Sign-on	38
Easy Login	38
Deciding between Single Sign-on and Easy Login	39
RGS operating modes	41
Multi-monitor configurations	41
Remote Computer monitor blanking overview	43
Video overlay surfaces	43
Image quality	43
Remote USB overview	44
USB session switching	45
Isochronous USB support	45
Install-time configuration of remote USB	45
Unique smartcard handling	47
Computers supporting remote USB	50
Supported USB devices	51
Remote audio	51
Remote audio on Windows	51
Remote audio on Linux	54
Support of sound recording devices on Microsoft Windows	55
Computers and operating systems which support RGS audio	56
Remote Clipboard overview	57
Interoperability of RGS and Microsoft Remote Desktop Connection	60
Remote Computer power saving states	61
Supported keyboard locales	61
RGS security features	62
Installing RGS	64
Installing RGS on Windows	64
Installing the Receiver on Windows	64
Manual installation of the Receiver on Windows	64
Automatic installation of the RGS Receiver on Windows	66
Usage	67
Command line options	67
Receiver installation log file	68
Uninstalling the RGS Receiver on Windows	69
Installing the Sender on Windows	69
Prerequisites for Sender installation on Windows Vista and Windows 7	69
Manual installation of the Sender on Windows	70
Starting and stopping the Sender on Windows	72
Sender command line options on Windows	73
The Sender GUI on Windows	75
Setting the Windows Sender process priority	75
Setting the Sender process priority using HP PA	76
Installing and enabling Single Sign-on	76
Enabling Single Sign-on during installation	76
Using the rgadmin tool to enable Single Sign-on	77
Manually enabling Single Sign-on (Windows XP Professional only)	79
Setting the local security policy (Windows XP Professional only)	80
Disabling Single Sign-on	80
Using the rgadmin tool to disable Single Sign-on	80
Manually disabling Single Sign-on (Windows XP Professional only)	81
Installing and Enabling Easy Login	82
Enabling Easy Login during installation	82
Using the rgadmin tool to enable Easy Login	82
Manually enabling Easy Login (Windows XP Professional only)	84
Chaining custom GINA modules for Easy Login (Windows XP Professional only)	85
Install time specification of the custom GINA module	85
Using the rgadmin tool to specify a custom GINA module	85
Manually enabling hprgina.dll to load a custom GINA module	85
Setting the Local Security Policy (Windows XP Professional)	86
Disabling Easy Login	86
Using the rgadmin tool to disable Easy Login	86
Manually disabling Easy Login (Windows XP Professional only)	87
Automatic installation of the RGS Sender on Windows	88
Usage	88
Command line options	88
Sender installation log file on Windows	90
Uninstalling the RGS Sender on Windows	90
Using the RGS Diagnostics Tool on Windows	91
Using the rgadmin tool	91
rgadmin tool on Windows XP Professional	92
rgadmin tool on Windows Vista and Windows 7	93
Installing RGS on Linux	94
Installing the Receiver on Linux	94
Uninstalling the Receiver on Linux	95
Linux Receiver Audio Requirements	95
Installing the Sender on Linux	95
Linux Sender Audio	98
Starting the Sender on Linux	98
Uninstalling the Sender on Linux	99
Pre-connection checklist	100
Local Computer (Receiver) checklist	100
Remote Computer (Sender) checklist	101
Network Interface binding on the Sender	102
Manual Network Interface reconfiguration	103
Network Interface reconfiguration using the Sender network interface binding properties	106
Using RGS through a firewall	107
Using RGS	109
Using RGS in Normal Mode	109
Receiver Control Panel	112
Setup Mode	112
Remote Display Window Toolbar	114
Remote Computer monitor blanking operation	115
Linux connection considerations	117
Full-screen crosshair cursors	117
Gamma correction on the Receiver	117
Black or blank connection session with the Linux Sender	117
RGS login methods	118
Standard Login	118
Easy Login	119
Single Sign-on	120
Changing your password	120
Collaborating	121
Creating a collaboration session	121
Collaboration notification dialog	123
Effect of low bandwidth and/or high latency networks on collaboration	125
Advanced capabilities	126
General options	127
General tab	127
General tab Experience section	128
Auto Launch	130
Game Mode	130
Remote audio operation	131
Configuring audio on the Microsoft Windows XP Professional Sender	131
Calibrating audio on the Microsoft Windows XP Professional Sender	135
Configuring audio on Microsoft Windows Vista and Windows 7 Sender	138
Configuring audio on Linux	138
Disabling audio on the Sender	139
Using audio	140
Potential audio issues	141
Remote USB operation	142
Attaching a local USB device to a Remote Computer	144
USB session switching	145
Local/Remote USB Device Management	146
Supported remote USB devices	147
Remote USB Access Control List	147
Determining USB device information	149
Determining USB device information for Windows	149
Determining USB device information for Linux	150
Verifying the USB data	150
Troubleshooting remote USB	151
Computers supporting remote USB	151
Supported USB devices	151
Check USB cable connections	151
Reset the USB device	151
Enable Remote USB	152
HP Remote Virtual USB Driver	153
USB device drivers and program support	154
Adjusting Network timeout settings	155
Network timeouts	156
Receiver network timeouts	156
Sender network timeout	159
Network timeout issues	159
Dialog timeouts	161
Hotkeys	163
Changing the Setup Mode hotkey sequence	165
Remote Clipboard operation	165
Remote Clipboard data transfers	166
Remote Clipboard filtering	169
Using the RGS log to detect clipboard problems	171
Receiver and Sender logging	173
Receiver logging	173
Sender logging	174
Statistics	176
Using Directory Mode	177
Directory file format	177
Starting the Receiver in Directory Mode	178
RGS properties	181
Property syntax	181
Setting property values in a configuration file	181
Setting properties on the command line	182
Authenticator properties	182
RGS Receiver properties	183
Receiver property hierarchy	183
Restoring Receiver properties default values	183
Properties set using the Receiver Control Panel	183
Receiver command line properties	183
rgreceiverconfig file properties	183
Archive file properties	184
Receiver default properties	184
Receiver property groups	184
Receiver general properties	188
Receiver experience properties	195
Receiver browser properties	195
Receiver audio properties	196
Receiver microphone property	196
Receiver USB properties	196
Receiver network properties	197
Receiver hotkey properties	198
Receiver Remote Clipboard properties	199
Receiver logging properties	200
Receiver image codec properties	201
Auto Launch session properties	202
Window placement and size properties	202
RGS Sender properties	204
Sender property groups	204
Sender general properties	205
Microphone property group	208
Sender network timeout properties	208
Sender USB access control list properties	208
Network Interface binding properties	209
Sender clipboard property	210
Sender event logging on Windows	211
The HPRemote log	211
Usages of the HPRemote log	214
Additional information on event logging	215
Remote Application Termination	216
RGS connection and user status	216
HPRemote log format	216
Agent design issues	221
Desktop session logout	221
Selective environment shutdown	221
Wrapping applications of interest	222
Administrator alerts	222
Anticipating user disconnects and reconnects	222
General agent design guidelines	222
Sample Agent	224
Additional features for Windows systems	229
RGS Sender Service Recovery Settings	229
Microsoft Remote Desktop Recovery	230
Optimizing RGS performance	231
Performance tuning for all platforms	231
Performance tuning for Windows	231
Troubleshooting graphics performance	232
Graphics adapter frame buffer read performance	232
Configuring your network for optimal performance	233
Troubleshooting RGS	235
Potential RGS issues and troubleshooting suggestions	235
RGS error messages	236
Receiver error messages	236
USB devices supported by RGS	239
Linux remote audio device support	246

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Linux remote audio device support

As shown in

Figure

RGS audio subsystem on Linux

on page

, an audio device is required to be

installed in Linux-based Remote Computers in order for application-generated audio to be sent to the

Local Computer. Furthermore, the audio device installed in the Remote Computer must have the ability

to record from a control that is the mix of all audio signals. On a Windows computer, by way of

comparison, this control is often called “Stereo Mix”. Linux, however, does not follow a standard

naming convention for this control—hence, the need to evaluate individual audio devices to determine

their suitability for use on Linux.

RGS will attempt to capture application generated audio from the Sender and playback the result on

the Receiver. Not all audio device drivers provide the capability to capture application generated

audio.

The following list of audio devices are known to work on Redhat EL4 and Redhat EL5:

●

SoundBlaster Audigy 4—SB0660

●

SoundBlaster Audigy 4—SB0610

●

SoundBlaster Audigy 2ZS—SB0350

●

SoundBlaster—SB0160

●

SoundBlaster Live!—CT4780

●

SoundBlaster Live!—CT4760

HP Personal Workstations have a high definition audio device on the motherboard. This device is

known to use a driver on Redhat EL4 and Redhat EL5 that does not allow RGS to capture application

generated audio.

The Linux virtual audio driver can be used on systems without audio hardware. In some cases, it may

be desirable to disable the physical audio device and install the virtual audio driver. See

Linux Sender

Audio

on page

for information on how to install the virtual audio driver.

IMPORTANT:

The Linux virtual audio driver is the “only” supported audio device for RHEL V6.

Hardware audio devices are not supported.

NOTE:

The Linux virtual audio driver is not supported in a virtual machine. Timing information from

the kernel in a virtual machine may not be precise enough to ensure consistent audio quality.

230

Appendix B

Linux remote audio device support