From mboxrd@z Thu Jan 1 00:00:00 1970 In-Reply-To: Date: Mon, 18 Jan 1999 02:19:10 +0100 To: linuxppc-dev@lists.linuxppc.org, Geert Uytterhoeven From: Benjamin Herrenschmidt Subject: MCLK=100 breaks PowerBook Message-Id: <19990118021910.020182@smtp.calvacom.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: The default mclk setting of 100MHz for the Rage LT-G breaks on my PowerBook G3 Series (garbage on screen, accelerated X hangs). I added mclk:83 to my command line and it works fine again (and, progress from pre-4, I have no more snow in X when moving things around). >atyfb: 3D RAGE LT PRO [0x4c47 rev 0x80] 4M SGRAM, 230 MHz PLL, 83 Mhz MCLK the chip ID 0x4c47 should be set to 83 MHz by default, not 100. Note that I made a typo the first time I tested and I used 88Mhz. it works fine too. MacOS ATI driver creates a strange property in the device tree. It's name is "MCLK,XCLK" and the value is 00001a38 00001a38. Geert, those values have any meaning to you ? If you tell me how to do, I could calc the MCLK used by MacOS by peeking appropriate registers from MacsBug and we could use this value for the kernel with this chipID. -- E-Mail: BenH. Web : [[ This message was sent via the linuxppc-dev mailing list. Replies are ]] [[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]] [[ reply is of general interest. To unsubscribe from linuxppc-dev, send ]] [[ the message 'unsubscribe' to linuxppc-dev-request@lists.linuxppc.org ]]