Greetings, SHORT VERSION: I think I've found a temporary solution to this Fedora install problem (found on other distros too), but I am not sure about _why_ it works, and it's the best solution. Any feedback is very appreciated. I've got a HP G6 1273SL laptop with this chipset and a live cd of Fedora 16 x86_64, KDE spin. When running live from the CD there were NO graphic problems. So I went and installed it on the laptop hard disk. The install was successful, or so anaconda said, so I rebooted. I got the GRUB 2 menu just fine. However, when I select or let start the default entry, the screen goes completely black. If I remove the "quiet" option in the grub entry I see that the last thing before it goes black is "radeon something..." (too fast to read it...) So it seems to me that is the same issue mentioned here: http://ask.fedoraproject.org/question/179/black-screen-while-startingwhen-first-half-of I have done a bit of research and found this: http://askubuntu.com/questions/28848/what-does-the-kernel-boot-parameter-set-acpi-osi-linux-do linked from https://answers.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+question/172376 which also mentions the same problem on Fedora, and indeed, if I enter "e" in grub and add to its initrd line the two parameters acpi_osi=Linux acpi_backlight=vendor Fedora boots without problems, but the laptop is quite warm. This other page says even the first parameter alone is OK: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/765438/comments/2 Now the questions: 1) first of all, I admit I don't really understand how and why this works, that is if this is a real/ complete / best solution. Should I add those two parameters to GRUB_CMDLINE_LINUX_DEFAULT, rerun grub2-mkconfig -o /boot/grub2/grub.cfg and go on? I believe i should also try some combination of vgaswitcheroo and/or radeon.modeset=0 as mentioned in other " Radeon HD 6470M and black linux screen" threads like http://ubuntuforums.org/showthread.php?p=11271523 http://ubuntuforums.org/showthread.php?t=1781662 that, as far as I undertsand, should be better since they should completely turn off that chip and make the laptop cooler but... how to implement them in Fedora? This not clear to me. 2) why there was no problem with the live cd??? What are the options used there that make the distro work from the cd but not from the hard disk? Please note that, for me, at least for the short/medium term, it is perfectly OK for me to use only the on-board graphich chipset instead of the radeon one, I don't need to do heavy 3D stuff with this laptop... Thanks, hope this helps. Marco -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
