This is a Cirrus Logic AC'97 Audio controller
In addition to an AC'97 Audio controller, these ThinkPad's also have a legacy soundchip with SoundBlaster compatibility for DOS applications (mainly games)
Only one sound driver should be loaded, preferably this AC'97 driver
- Chipset: CS4297 or CS4297A
- Interface: AC'97 2.1
Linux OSS driver
This sound chip is supported by the i810_audio kernel module.
Linux ALSA driver
This sound chip is supported by the snd-intel8x0 kernel module.
ThinkPad's this chip may be found in
CS4297 / CS4280 combo
CS4297A / CS4281 combo
CS4297A / CS4624 combo