Hello Prof. Niels R. Walet Did you check the grub settings?
/etc/default/grub check the line - GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=scientific/root rd.lvm.lv=scientific/swap rhgb quiet" make sure that nomodeset is not in the GRUB_CMDLINE_LINUX variable. See this explaination: https://ask.fedoraproject.org/en/question/46846/what-does-nomodeset-do/ Best Regards, Michael Alaimo On Wed, Jun 15, 2016 at 5:42 AM, Niels Walet <[email protected]> wrote: > I seem to have the "radeon no UMS" error with the open source radeon > driver, which means it falls back to VGA. > Quite an intriguing one, because of my 10 HP elitedesk computers (supposedly > equivalent), this is the only one refuses to run the proprietary fglrx > driver. (This is on SL7.2). > For that one, I can not get radeon to work--it loads, but gets unloaded > again after a failure, which I guess is linked to the no UMS problem. I have > disabled the onboard graphics, set the "nomodeset" parameters (otherwise it > REALLY doesn't work). > I find many discussions of similar issues all over the place, but no real > solution. May have to run the built in graphics instead.... Any ideas? I > tried to add a 20-radeon.conf file according to > https://wiki.archlinux.org/index.php/ATI, and that changed things, but X now > tries to start a number of times and fails. Any suggestions? > Niels > > excerpt from /var/log/messages > [drm] VGACON disable radeon kernel modesetting. > [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module! > > excerpt from /var/log/XOrg.0.log > HAWAII, HAWAII, HAWAII, HAWAII, HAWAII > [ 27.334] (II) modesetting: Driver for Modesetting Kernel Drivers: kms > [ 27.334] (II) FBDEV: driver for framebuffer: fbdev > [ 27.334] (II) VESA: driver for VESA chipsets: vesa > [ 27.334] (++) using VT number 1 > > [ 27.345] (II) [KMS] drm report modesetting isn't supported. > [ 27.345] (EE) open /dev/dri/card0: No such file or directory > [ 27.345] (WW) Falling back to old probe method for modesetting > [ 27.345] (EE) open /dev/dri/card0: No such file or directory > [ 27.345] (II) Loading sub module "fbdevhw" > [ 27.345] (II) LoadModule: "fbdevhw" > [ 27.364] (II) Loading /usr/lib64/xorg/modules/libfbdevhw.so > [ 27.379] (II) Module fbdevhw: vendor="X.Org Foundation" > [ 27.379] compiled for 1.17.2, module version = 0.0.2 > [ 27.379] ABI class: X.Org Video Driver, version 19.0 > [ 27.379] (**) FBDEV(2): claimed PCI slot 1@0:0:0 > [ 27.379] (II) FBDEV(2): using default device > [ 27.379] (WW) Falling back to old probe method for vesa > [ 27.379] (EE) Screen 0 deleted because of no matching config section. > [ 27.379] (II) UnloadModule: "radeon" > [ 27.379] (EE) Screen 0 deleted because of no matching config section. > [ 27.379] (II) UnloadModule: "modesetting" > > --- > Prof. Niels R. Walet Phone: +44(0)1613063693 > School of Physics and Astronomy Mobile: +44(0)7516622121 > The University of Manchester Room 7.7, Schuster Building > Manchester, M13 9PL, UK > email: [email protected] twitter: @nwalet
