** Description changed: Binary package hint: nvidia-glx-180 This can affect almost all releases (6.10 7.04, 7.10, 8.04, 8.10, 9.04+) It usually only shows up dramatically with video cards that have large memory (e.g. 256MB) and on systems that a) have 3GB or more RAM and/or - b) have 64-bit CPUs on 32-bit northbridge chipsets (e.g. Intel 945) + b) have 64-bit CPUs on 32-bit north-bridge chipsets (e.g. Intel 945) Typical symptom: "failed to load the nvidia kernel module" This issue could affect all versions of the Nvidia proprietary drivers and others. + Recently I've seen several users in IRC #ubuntu asking for help but + without solving the issue. When I saw Keith Dewitt asking the same + question on 2009-03-14 I arranged with him to access his system via SSH + and a multiuser screen session to diagnose the issue. Keith was very + patient and supportive and his assistance led directly to this + discovery. + + There are also threads on the nvidia forums with the same issues. + The symptoms are that users report that systems with Nvidia-based graphics cards won't start the X server successfully. There are a wide - range of symptoms that don't immediately lead to the cause. + range of reports that don't immediately pin-point the cause. The fact the nvidia kernel module failed to load is the biggest clue. Check dmesg and /var/log/kern.log for something along these lines: [ 20.137717] nvidia: module license 'NVIDIA' taints kernel. [ 20.412849] ACPI: PCI Interrupt Link [LNEB] enabled at IRQ 18 [ 20.412858] nvidia 0000:02:00.0: PCI INT A -> Link[LNEB] -> GSI 18 (level, low) -> IRQ 18 [ 20.412862] NVRM: This PCI I/O region assigned to your NVIDIA device is invalid: [ 20.412862] NVRM: BAR1 is 256M @ 0x30000000 (PCI:0002:00.0) [ 20.412865] NVRM: This is a 64-bit BAR mapped above 4GB by the system BIOS or [ 20.412865] NVRM: Linux kernel. The NVIDIA Linux graphics driver and other [ 20.412866] NVRM: system software do not currently support this configuration [ 20.412867] NVRM: reliably. [ 20.412872] nvidia: probe of 0000:02:00.0 failed with error -1 [ 20.412887] NVRM: The NVIDIA probe routine failed for 1 device(s). [ 20.412889] NVRM: None of the NVIDIA graphics adapters were initialized! - The reason is that the video chipset's PCI IOMEM RAM (in this case - 256MB) cannot be allocated in the PCI IOMEM region from 3GB-4GB since - other devices have already been given assignments that mean there isn't - a 256MB gap available on a 256MB boundary - in other words, either at - 3GB or 3.25GB. + Also check /var/log/Xorg.0.log for this tell-tale: + + (--) PCI:*(0...@2:0:0) nVidia Corporation GeForce 8400 GS rev 161, Mem @ 0xfd000000 + /16777216, 0x130000000/268435456, 0xfa000000/33554432, I/O @ 0x0000ec00/128, BIO + S @ 0x????????/131072 + + Notice that the video card's IOMEM allocation is at 0x300000000 (5GB). + + The reason for the failure is that the video chipset's PCI IOMEM RAM (in + this case 256MB) cannot be allocated in the PCI IOMEM region below $GB + (from 3GB-4GB) since other devices have already been given assignments + that mean there isn't a 256MB gap available on a 256MB boundary - in + other words, either at 3GB or 3.25GB. The host system has 4GB of system RAM which causes the kernel to prevent the use of the 3GB-3.25GB range, and other allocations prevent the use other ranges. A temporary work-around is to alter the BIOS video IOMEM position to below 4GB (on 64-bit architectures) or reduce the system's RAM to 2GB to leave sufficient free space. For the last year I've had an ongoing project to write a completely new PCI IOMEM system for the Linux kernel. I've added the mainline bug report that triggered the development to this report. Additionally, here is a link to my Wiki describing the issue and solutions. http://tjworld.net/wiki/Linux/PCIDynamicResourceAllocationManagement
-- No PCI IOMEM space available below 4GB https://bugs.launchpad.net/bugs/342926 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
