ATI Mobility Radeon X300

ATI Mobility Radeon X300 This is a ATI video adapter Features Chipset: ATI M22 PCI ID: 1002:5460 PCI Express x16 32 or 64MB GDDR1 video memory

Linux driver

Use Driver "radeon" in the xorg.conf file - it works at least for xorg 6.8.2, maybe older versions too.

ThinkPad LCD

Display on the internal LCD works as long as you set the monitor settings correct.

External VGA port

There are known problems. The driver from ATI turns off the switching between internal and external port.

Workarounds

• Don't use the ATI driver if you want to use this feature - use the VESA driver instead.
• Start X without an external monitor, and then connect the external monitor. Both displays will be active, and cannot be switched off until you exit X. To have a reasona ble refresh rate on the external monitor (the default is the LCD's 50Hz), use the following in /etc/X11/xorg.conf:

External VGA port

There are known problems. The driver from ATI turns off the switching between internal and external port.

Workarounds:

• Use the "vesa" driver built into X.org instead of the ATI or "radeon" drivers. This loses acceleration and some capabilities.
• Start X without an external monitor, and then connect the external monitor. Both displays will be active, and cannot be switched off until you exit X. Note that if the external monitor is connected when X starts, the LCD will be deactivated and you will need to restart X. To have a reasonable refresh rate on the external monitor (the default is the LCD's 50Hz), use the following in /etc/X11/xorg.conf:

Section "Device"
	Identifier  "Videocard0"
	VendorName  "Videocard vendor"
	BoardName   "ATI Radeon Mobility X300"

	Driver      "radeon"
	Option      "DynamicClocks" "on"

	Option      "MergedFB" "on"
	Option      "CRT2Hsync" "50-75"
	Option      "CRT2VRefresh" "30-82"
EndSection

(Tested wth Fedora Core 4 on ThinkPad T43).

See also the related discussion about Additional options for the radeon driver.

S-Video port (TV-out)

Linux support status is unknown.

There is some generic advise here about making it work using the proprietary Fglrx driver.

DVI port

??

Proprietary ATI driver

The fglrx driver adds 3D acceleration.

Linux kernel Framebuffer driver

??

ThinkPad's this chip may be found in

• R52
• T43
• Z60m