Re: [gentoo-user] Verify uefi installation
On Tue, 24 Sep 2019 09:31:08 +1000, Adam Carter wrote: > > An update of the firmware flashes the UEFI EEPROM and as far as I have > > experienced no settings are retained. > > A backward step from older MBR / BIOS functionality then. I guess that > indicates that code and configuration are not separated. I recently updated a firmware and all worked as before, so I think this is implementation-dependent. > # gdisk -l /dev/nvme0n1 > GPT fdisk (gdisk) version 1.0.4 > > Partition table scan: > MBR: protective > BSD: not present > APM: not present > GPT: present > > Number Start (sector)End (sector) Size Code Name >12048 1955839 954.0 MiB EF00 boot >2 1955840 976771071 464.8 GiB 8300 root > > Not sure where the 'MBR: protective' came from as the system has been > linux only from the start. I guess its either the default or I made an > error during the build. AFAIK this is still a valid configuration, so I > assume the signature message is not related to that. > > I guess i could just try re-writing the partition table to see if that > clears it. I've just checked a couple of systems that have never used MBR and they say the same. I'd ignore that. -- Neil Bothwick If at first you don't succeed, you'll get a lot of free advice from folks who didn't succeed either. pgpmYfKbvL8og.pgp Description: OpenPGP digital signature
Re: [gentoo-user] Verify uefi installation
> > > Looks like the setting gets cleared with every BIOS update. I assume this > > is due to shitty coding by the MB manufacturer and not a limitation of > UEFI. > > An update of the firmware flashes the UEFI EEPROM and as far as I have > experienced no settings are retained. A backward step from older MBR / BIOS functionality then. I guess that indicates that code and configuration are not separated. > A fresh probe of MoBo devices at first boot re-lists anything bootable. > Do you find that the re-generated list only finds devices, not the .efi files on those devices? (and therefore efibootmgr is still required?) > Desktop/workstation UEFI firmware have more features, which allow tweaking > boot lists. Some also offer a back up/restore facility for settings from > a > file. > > Laptop UEFI boot menus are more sparce, in which case efibootmgr, or with > systemd-boot the bootctl command allow managing UEFI boot entries. I > believe > MSWindows have their own applications to do the same. > Ok thanks for the info. > Regarding the message "GUID partition table header signature is wrong", > this > is probably indicative of an MBR partition table - but I'm not sure. Have > you > installed some OS on an MBR partition schema? > # gdisk -l /dev/nvme0n1 GPT fdisk (gdisk) version 1.0.4 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Number Start (sector)End (sector) Size Code Name 12048 1955839 954.0 MiB EF00 boot 2 1955840 976771071 464.8 GiB 8300 root Not sure where the 'MBR: protective' came from as the system has been linux only from the start. I guess its either the default or I made an error during the build. AFAIK this is still a valid configuration, so I assume the signature message is not related to that. I guess i could just try re-writing the partition table to see if that clears it.
Re: [gentoo-user] Verify uefi installation
On Monday, 23 September 2019 08:43:52 BST Adam Carter wrote: > On Mon, Sep 23, 2019 at 3:38 PM J. Roeleveld wrote: > > On 23 September 2019 07:33:44 CEST, Adam Carter > > > > wrote: > > >Follow on question; what does efibootmgr actually modify? Is it writing > > >to > > >motherboard EEPROM values similar what happens when you write changes > > >in > > >the BIOS setup pages? > > >If you, does mean I may have been able to fix this issue in the BIOS? > > > > It updates something in the CMOS, however, not all UEFI bioses support > > manually editing this. > > I haven't found a decent option for this on any system I own yet, apart > > from efibootmgr. > > Ok thanks. > > Looks like the setting gets cleared with every BIOS update. I assume this > is due to shitty coding by the MB manufacturer and not a limitation of UEFI. An update of the firmware flashes the UEFI EEPROM and as far as I have experienced no settings are retained. A fresh probe of MoBo devices at first boot re-lists anything bootable. Desktop/workstation UEFI firmware have more features, which allow tweaking boot lists. Some also offer a back up/restore facility for settings from a file. Laptop UEFI boot menus are more sparce, in which case efibootmgr, or with systemd-boot the bootctl command allow managing UEFI boot entries. I believe MSWindows have their own applications to do the same. Regarding the message "GUID partition table header signature is wrong", this is probably indicative of an MBR partition table - but I'm not sure. Have you installed some OS on an MBR partition schema? -- Regards, Mick signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Verify uefi installation
On Mon, Sep 23, 2019 at 3:38 PM J. Roeleveld wrote: > On 23 September 2019 07:33:44 CEST, Adam Carter > wrote: > >Follow on question; what does efibootmgr actually modify? Is it writing > >to > >motherboard EEPROM values similar what happens when you write changes > >in > >the BIOS setup pages? > >If you, does mean I may have been able to fix this issue in the BIOS? > > It updates something in the CMOS, however, not all UEFI bioses support > manually editing this. > I haven't found a decent option for this on any system I own yet, apart > from efibootmgr. > Ok thanks. Looks like the setting gets cleared with every BIOS update. I assume this is due to shitty coding by the MB manufacturer and not a limitation of UEFI. Anyway i'm running the '1.0.0.3 ABBA' BIOS fine with my Zen2 now.
Re: [gentoo-user] Verify uefi installation
On 23 September 2019 07:33:44 CEST, Adam Carter wrote: >Follow on question; what does efibootmgr actually modify? Is it writing >to >motherboard EEPROM values similar what happens when you write changes >in >the BIOS setup pages? >If you, does mean I may have been able to fix this issue in the BIOS? It updates something in the CMOS, however, not all UEFI bioses support manually editing this. I haven't found a decent option for this on any system I own yet, apart from efibootmgr. -- Joost -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
Re: [gentoo-user] Verify uefi installation
Follow on question; what does efibootmgr actually modify? Is it writing to motherboard EEPROM values similar what happens when you write changes in the BIOS setup pages? If you, does mean I may have been able to fix this issue in the BIOS?
Re: [gentoo-user] Verify uefi installation
On Sun, Sep 22, 2019 at 10:56 PM Mick wrote: > The UEFI menu will present you with a list of bootable devices. The UEFI > firmware will probe connected devices to find anything which can provide > booting (from hard drives, to USB devices, to network ports) and list > them. > Among those the grubx64.efi ought to be listed as an available option. > Ok that's what I remembered. > If not, you can use the efibootmgr to set it as a bootable image in the > UEFI > firmware. Boot with a Live-USB and follow this page: > > https://wiki.gentoo.org/wiki/Efibootmgr Done, and it now boots. When i ran the efibootmgr command it reports "GUID partition table header signature is wrong" so i'll look at that next. Thanks
Re: [gentoo-user] Verify uefi installation
On Sunday, 22 September 2019 05:22:02 BST Adam Carter wrote: > After updating the BIOS on my motherboard, the system will no longer boot. > The NVME drive is still recognised in the BIOS and set to the the primary > boot device. However, when i originally installed the system (and assuming > I remember correctly) the boot order setting in the BIOS showed something > about the operating system as part of the M2 drive entry, which it doesn't > now. The original BIOS is not available for download, so I tried a couple > of others, including the oldest available, but no change. > > I can boot from a usb drive and mount the vfat /dev/nvme0n1p1 partition. > The usual kernel files are there, as is EFI/gentoo/grubx64.efi > > What can I do to verify the OS installation? The UEFI menu will present you with a list of bootable devices. The UEFI firmware will probe connected devices to find anything which can provide booting (from hard drives, to USB devices, to network ports) and list them. Among those the grubx64.efi ought to be listed as an available option. If not, you can use the efibootmgr to set it as a bootable image in the UEFI firmware. Boot with a Live-USB and follow this page: https://wiki.gentoo.org/wiki/Efibootmgr Of course, grubx64.efi will only boot OS kernels it has been configured to boot with. So, make sure while you're in the Live-USB environment and have chrooted into your installation, you run 'grub-mkconfig -o /boot/grub/ grub.cfg' or what is appropriate for your boot filesystem. HTH. -- Regards, Mick signature.asc Description: This is a digitally signed message part.
[gentoo-user] Verify uefi installation
After updating the BIOS on my motherboard, the system will no longer boot. The NVME drive is still recognised in the BIOS and set to the the primary boot device. However, when i originally installed the system (and assuming I remember correctly) the boot order setting in the BIOS showed something about the operating system as part of the M2 drive entry, which it doesn't now. The original BIOS is not available for download, so I tried a couple of others, including the oldest available, but no change. I can boot from a usb drive and mount the vfat /dev/nvme0n1p1 partition. The usual kernel files are there, as is EFI/gentoo/grubx64.efi What can I do to verify the OS installation?
