i2cdetect output has both 0x54 and 0x56. But I've stuck on getting vbios images. # nvagetbios -s PROM >vbios.rom gives me the error you've mentioned: <blockquote style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;" class="gmail_quote"> Attempt to extract the vbios from card 0 (nv86) using PROM Invalid signature(0x55aa). You may want to try another retrieval method. </blockquote> and adding string (without quotes) "nouveau.vbios=ACPI" to kernel options doesn't work at all. GRUB2 shows me error: <blockquote style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;" class="gmail_quote">alloc magic is broken at 0xdfbdbc50 Aborted. Press any key to exit. </blockquote><div> Nouveau already works MUCH better than proprietary driver for my tasks. Thanks a lot for that! Please help me to help you. My system info: <ul><li>Debian testing/unstable</li><li>kernel 3.0.0-1-686-pae from repository </li><li>libdrm-nouveau1a 2.4.26-1</li><li>xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1+exp1 </li></ul></div>-- Дмитрий Тартынов aka Dmitriy.trt Jabber: <a href="mailto:dmitriy.trt@jabber.ru" target="_blank">dmitriy.trt@jabber.ru</a> Skype: dmitriytrt