Fedora – F28 Annoyances, and Workarounds..

Running Fedora 28 on the test system, I have encountered the following issues with various applications, and found substitute rpm workarounds..  Usually, these can be installed by downloading them ,and then using # rpm -Uvh……… –force.. Grub-customizer still crashes, but … Continue reading

Kernel – GCC8 / ‘Objtool Warnings’ Patches..

There are now patches available to deal with the host of ‘objtool‘ warnings when compiling the kernel with GCC8: …………………………….. drivers/video/fbdev/core/fbmem.o: warning: objtool: fb_set_var()+0x209: sibling call from callable instruction with modified stack frame drivers/video/fbdev/core/fbmem.o: warning: objtool: do_remove_conflicting_framebuffers()+0xa6: sibling call from … Continue reading

GCC – Update to 8.1.1 – Still Gives Kernel Compile Warnings..

Fedora 28 has GCC 8.1.1 available (currently in ‘updates-testing‘ repo), and I tested this with Kernel 4.17-rc4, to see if there was any improvement in the horde of warnings generated with 8.0.1. In short, there is no real difference: ……………………………… … Continue reading

Fedora – 28 Released, but Fails with GCC 8 and Kernel 4.16…

Fedora 28 has been released, but this includes GCC 8 (8.0.1) which – currently – is not capable of compiling Kernel 4.16 as-is (tested with 4.16.6): ……………………………. CC /usr/src/linux-4.16.6/tools/objtool/objtool.o CC /usr/src/linux-4.16.6/tools/objtool/libstring.o CC /usr/src/linux-4.16.6/tools/objtool/str_error_r.o ../lib/str_error_r.c: In function ‘str_error_r’: ../lib/str_error_r.c:25:3: error: passing … Continue reading

Kernel – 4.16 Released – OK with Latest VMware, and (patched) NVIDIA..

Kernel version 4.16 is out, and brief details of changes since -rc7 are here:  http://lkml.iu.edu/hypermail/linux/kernel/1804.0/00174.html $ uname -a Linux rglx 4.16.0 #1 SMP Sun Apr 1 15:20:00 PDT 2018 x86_64 x86_64 x86_64 GNU/Linux This release is OK with VMware 14.1.1, … Continue reading

NVIDIA – New Driver 384.130 – Still Fails with 4.16..

NVIDIA have released driver 384.130, and details are here:  http://www.nvidia.com/download/driverResults.aspx/132524/en-us The ‘Release Highlights’ clearly specify ”Improved compatibility with recent Linux kernels.”, and yet it still fails with Kernel 4.16 (tested with 4.16-rc7): ……………… ld -r -o /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-384.130/kernel/nvidia-modeset/nv-modeset-interface.o /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-384.130/kernel/nvidia-modeset/nvidia-modeset-linux.o Building modules, … Continue reading

NVIDIA – Another New Driver – Still Broken with 4.16..

NVIDIA have released another new driver – 390.48, and details are here: http://www.nvidia.com/Download/driverResults.aspx/132530/en-us Surprisingly, this version is still not able to function with Kernel 4.16 (tested with 4.16-rc7): ……………….. Building modules, stage 2. MODPOST 4 modules WARNING: “swiotlb_map_sg_attrs” [/home/rgadsdon/kernel/NVIDIA-Linux-x86_64-390.48/kernel/nvidia.ko] undefined! … Continue reading

Kernel – GCC and ‘Retpoline’..

The recent summary of Kernel 4.15 mentioned the test for ‘compliant’ versions of GCC which fully support the retpoline mitigation, but only gave an example of non-compliance: With GCC 7.2: ~]$ cat /sys/devices/system/cpu/vulnerabilities/spectre_v2  Vulnerable: Minimal generic ASM retpoline I re-created … Continue reading

Kernel – Urgent Changes in Latest Versions, to Fix Intel CPU Security..

Apparently, there has been a major security defect discovered in Intel CPUs, and full details have been embargoed until early-January, but there is a comprehensive article in The Register, here:  https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/ The Linux Kernel devs have been working to provide … Continue reading

VMware – Potential Fix for W/S 14 Performance/Memory Issues..

I had found that although VMware 14.0.0 installed OK with Kernel 4.13, the runtime performance was rather ‘sluggish’, and others have reported more serious memory issues… There is a patch that may help with this – and thanks to Roke … Continue reading