On 12/29/2017 10:17 PM, Linus Torvalds wrote: > On Fri, Dec 29, 2017 at 1:02 PM, Toralf Förster <toralf.foerster@xxxxxx> wrote: >> On 12/29/2017 09:12 PM, Linus Torvalds wrote: >>> instead, and see if that makes a difference, that would narrow down >>> the possible root cause of this problem. >> >> not at this ThinkPad T440s (didn't test at the server with an i7-3930). >> >> Boot stops just at: >> >> tsc: Refined TSC clocksource calibration: 2494.225 MHz >> clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x23f3ea95b09, max_idle_ns: 440795287034 ns > > Uhhuh. So for Alexander Troy, just getting rid of the -march=core2 > fixed the boot. > > But not for you. > > Strange. It really looked like the exact same thing. > >> This is a "Intel(R) Core(TM) i5-4300U CPU @ 1.90GHz" with gcc-6.4 > > Yeah, other reporters of this have used gcc-6.4.0 too. > > But there's been some muddying of the waters there too - changing > compilers have fixed it for some cases, but there's at least one > report that a kernel build with gcc-7.2.0 still had the issue (and > another that said it didn't). > > But the MCORE2 was consistent for several people - including you. > Until this point. > > Strange. > > The only other thing (apart from the compiler flag) that MCORE2 > results in is to enable > > CONFIG_X86_INTEL_USERCOPY > CONFIG_X86_USE_PPRO_CHECKSUM > CONFIG_X86_P6_NOP > > and the two first of those shouldn't even matter on x86-64, and I > don't see that last one making any difference either. > > So because it looks so impossible that the "-march=core2" didn't make > a difference for you, I'll ask you to please double-check that you > actually booted into the right kernel. > > Sorry for doubting you, but your report just broke the _one_ > consistent thing we've seen about this bug. > > Linus > I double-checked it. The bad news - the issue is not solved with the changed cflags. The good news - I could compile eventually a working config for my desktop (works fine with 4.14.10 with generic CPU) having a higher screen resolution during boot. So I made a "make distclean", followed by a "sudo zcat /proc/config.gz > .config", changed the .config to use MCORE2 instead of GENERIC and defined the string "-local" to ensure that the modules directory is really unique. Then I run "time make -j4 && sudo make modules_install && sudo cp arch/x86_64/boot/bzImage /boot/vmlinuz-0 && sudo grub-mkconfig -o /boot/grub/grub.cfg", booted and made 3 fotos which were uploaded to [1], look for IMG_* [1] https://zwiebeltoralf.de/pub/ -- Toralf PGP C4EACDDE 0076E94E