Hi Andrei, my grub is finally working :-)
I contacted asus tech support. My problem was fixed by reset of cmos memory via hardware jumpers on motherboard. Although update of bios and load of defaults that I did before seems to have same effect the result was different. Best regards, Jan On Thu, Feb 11, 2016 at 3:11 PM, Jan Gregor <[email protected]> wrote: > On Thu, Feb 11, 2016 at 12:42 PM Andrei Borzenkov <[email protected]> > wrote: > >> On Thu, Feb 11, 2016 at 12:49 PM, Jan Gregor <[email protected]> >> wrote: >> > Yes, it didn't worked in slax livecd until linux kernel was started. I >> also >> > experienced same in debian installer until I disabled csm in bios that >> turns >> > on uefi mode. >> > >> > I'm aware of legacy usb support in bios and it is enabled. >> > >> >> And what about other settings there? Did you try all combinations? >> > > Yes, I hope so. There were three options for usb like ehci support and in > another part of bios setup CSM options. > > >> >> > The problem can be that microsoft natural keyboard is visible as two >> usb hid >> > devices and the bios has somehow broken support for non-uefi case via >> bios >> > services. >> > >> > Well, I didn't expect that native usb drivers makes booting of windows >> > impossible. >> > >> >> Well ... driver changes hardware state without BIOS being aware of it >> so we try to play safe. If it possible to allow concurrent BIOS and >> GRUB access, someone with better USB knowledge please chime in. >> > > I understand. > > >> >> > Thanks, >> > Jan >> > >> > On Thu, Feb 11, 2016 at 10:24 AM Andrei Borzenkov <[email protected]> >> > wrote: >> >> >> >> On Thu, Feb 11, 2016 at 12:04 PM, Jan Gregor <[email protected]> >> wrote: >> >> > Hello, >> >> > >> >> > my keyboard (microsoft natural 4000) doesn't work in boot managers >> >> >> >> Do you mean it also does not work in other boot managers, not only >> GRUB? >> >> >> >> > although it is functional in bios, windows, linux and uefi mode. >> >> > Unfortunatelly my disk works in mbr mode so uefi is not option for >> me. >> >> > The >> >> > keyboard worked ok with old computer so I think the problem relates >> to >> >> > my >> >> > current motherboard (asus p9dws). >> >> > >> >> > I use grub2 from fresh debian installation (jessie), version >> >> > 2.02~beta2-22+deb8u1. >> >> > >> >> > Without modifications, grub2 boots without problems debian and >> windows >> >> > 10. >> >> > Unfortunately due to unfuctional keyboard I have to externally change >> >> > default option. >> >> > >> >> > When I added following lines to start of grub.cfg, my keyboard >> works. >> >> > nativedisk >> >> > insmod usb >> >> > insmod usb_keyboard >> >> > insmod ehci >> >> > >> >> > Unfortunatelly boot of windows 10 ends with following error message >> >> > >> >> > A disk read error occured. Press Ctrl + Alt + Del >> >> > >> >> > I think the error can relate to usb support that forces grub to use >> >> > nativedisk module. Can you recommend how to solve booting of windows >> 10 >> >> > in >> >> > this case ? >> >> > >> >> >> >> No, you cannot chainload Windows once you tainted system with native >> >> USB drivers. But the real question is why keyboard does not work. GRUB >> >> is using BIOS services to perform input/output and you say it works in >> >> BIOS setup, correct? It sounds like BIOS stops USB support when it >> >> boots something. Try playing with BIOS setup options, in particular >> >> "Legacy USB Support"; according to documentation if it is disabled, >> >> then "USB devices can be used only for the BIOS setup program". >> >
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