On Vista, Windows 7 and later (?)
the solution is simple: Use 32-bit colors (-a 32)
By default, Windows 2003 RDP connections were designed to be limited to 16-bit colour. This makes
some of the Windows icons look bad because they were designed to be
viewed in 24-bit colour or higher.
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Go to Start -> Run.
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Type in gpedit.msc and click on OK to run the program.
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In the window that opens’ left panel, go to Computer Configuration
-> Administrative Templates -> Windows Components -> Terminal
Services.
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On the right-hand panel, find the setting that says Limit maximum color depth and double-click it.
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In the dialog box that pops up, select Enabled from the radio buttons at the top of the dialog.
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In the combo box, select “24 bit” or “Client compactable“.
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Click OK.
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Restart the computer for settings to take effect.
24 bit RDP under Windows XP
While RDP connections to
Windows 2003 Server default to 16 bit color depth and can be changed to
24 bit via the Terminal Services Configuration\\Connections mmc snap in,
what about Windows XP?
Did you ever notice that when you connect to Windows XP via RDP, some
colors and icons are just a bit off? This is because the single user XP
RDP Server defaults to 16 bit color depth even though it is capable of
running 24 bit. While there is no mmc snap in for increasing it, it can
be done via the registry.
Open up the Registry Editor (Start -> Run -> regedit) and navigate to the following key:
HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\WinStations\\RDP-Tcp
Change ColorDepth to 4.
Reboot Windows XP to have the change take effect.
运行： rdesktop -a 24 192.168.1.12
原文链接:
http://blog.dhampir.no/content/remote-desktop-does-not-support-colour-depth-24-falling-back-to-16
https://blogs.oracle.com/ThinkThin/entry/24_bit_rdp_under_windows
http://blog.dhampir.no/content/remote-desktop-does-not-support-colour-depth-24-falling-back-to-16
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