Red Hat Bugzilla – Bug 232584
Kernel 2.6.20-1.2925.fc6 does not correctly detect PCI Bridge
Last modified: 2007-11-30 17:11:59 EST
Description of problem: Kernel 2.6.20-1.2925.fc6 does not properly detect the PCI Bridge in order to successfully configure SLI This is a regression from previous kernels ... SLI has worked fine with most if not all kernels since 2.17 Version-Release number of selected component (if applicable): 2.6.20-1.2925.fc6 How reproducible: 100 % Steps to Reproduce: 1.Boot with SLI enabled 2. 3. Actual results: The kernel does not properly detect the PCI bridge and therefore the X server will not start .. black screen mouse is active Expected results: The kernel should properly detect the PCI bridge Additional info: 2 Nvidia [GeForce 7800 GTX] Not a driver issue as far as I can determine as the same failure occurs whether I use the nv or kmod-nvida from the Livna repo When SLI is disabled the boot, login and the successful start of the Xserver works as expected.
Created attachment 150201 [details] /sbin/lspci -t /sbin/lspci | grep -i nvidia uname -r 2.6.20-1.2925.fc6
Output of "rpm -qa | grep nvidia" does not show the driver for kernel 2925. If you have both 2911.6.5 and 2925 kernels installed, you should see: $ rpm -qa | grep nvidia kmod-nvidia-1.0.9755-2.2.6.20_1.2925.fc6 kmod-nvidia-1.0.9755-2.2.6.19_1.2911.6.5.fc6 xorg-x11-drv-nvidia-1.0.9755-3.lvn6
Hello: My mistake as I failed to include that :) #rpm -qa | grep nvidia xorg-x11-drv-nvidia-1.0.9755-3.lvn6 kmod-nvidia-1.0.9755-2.2.6.19_1.2911.6.5.fc6 kmod-nvidia-1.0.9755-2.2.6.20_1.2925.fc6 Dan
The kernel 2.6.20-1.2925.fc6 can be successfully booted with SLI enabled when I boot with pci=nommconf added as a parameter. Dan
please attach a dmesg output from a working and non-working kernel (note: attach, not paste into comments :)
Created attachment 150445 [details] Working and Not Working Dmesg Hello: Both were created with SLI enabled [/etc/X11/xorg.conf] and without any desktop effects enabled Dan
Hello: Just some additional information, hopefully it helps as I am not all that technical and somewhat confused ? With SLI enabled, the same xorg.conf and the same nViida drivers: And no desktop effects enabled [compiz or beryl] everything appears to work correctly and as expected. This is the same with both the 2.6.19 and 2.6.20 kernels. With desktop effects enabled [compiz or beryl] the 2.6.19 kernel works as expected. However, the 2.6.20 kernel will not launch a usable DE [Gnome, KDE or XFCE] If SLI is disabled the 2.6.20 kernel works fine with desktop effects [compiz or beryl] enabled ? SLI and whether it is enabled or disabled, seems to be the only variable I can track down Regards Dan
Can you post the log from working 2.6.20 (with pci=nommconf) ?
Created attachment 150718 [details] Dmesg from 2.6.20 Kernel booted with pci=nocommf with and without SLI enabled
Hello: I just wanted to add that with pci=nommconf it may or may not boot correctly to the Desktop with SLI enabled. It's about a 50/50 chance. Dan
Hello: Exactly the same issue with the latest kernel 2.6.20-1.2933.fc6 and same nVidia kmod-nvidia drivers Dan
Created attachment 152601 [details] dmesg and xorg.0.log from 2944 i686 kernel
Created attachment 152602 [details] xorg.0.log 2944 i686 kernel
Comment on attachment 152601 [details] dmesg and xorg.0.log from 2944 i686 kernel Hello: Thanks folks. It appears that the changes made to the 2944 kernel have fixed the issue. 2.6.20-1.2944.fc6 i686 kmod-nvidia-1.0.9755-2.2.6.20_1.2944.fc6 Dan
Created attachment 152666 [details] Dmesg and xorg without SLI
Created attachment 152667 [details] Dmesg and xorg with SLI