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146 lines
6.8 KiB
Markdown
146 lines
6.8 KiB
Markdown
---
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layout: doc
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title: UEFI Troubleshooting
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permalink: /doc/uefi-troubleshooting/
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---
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Troubleshooting UEFI related problems
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========================================
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Change installer kernel parameters in UEFI
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---------------------
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If you've installed successfully in legacy mode but had to change some kernel parameters for it to work, you should try installing in UEFI mode with the same parameters.
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**Change the xen configuration on a USB media**
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01. Attach the usb disk, mount the EFI partition (second partition available on the disk)
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02. Edit your xen config (`xen.cfg/BOOTX64.cfg`) changing the `kernel` key to add your kernel parameters on the boot entry of your choice
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03. Install using your modified boot entry
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**Change xen configuration directly in an iso image**
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01. Get EFI partition boundaries `parted Qubes-R4.0-rc4-x86_64.iso unit B print`
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02. Using the start address and the size of the EFI partition, setup a loop device for it `sudo losetup -o 524288 --sizelimit 30562304 /dev/loop0 Qubes-R4.0-rc4-x86_64.iso`
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03. Mount the loop device `sudo mount /dev/loop0 /mnt`
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04. Edit `EFI/BOOT/BOOTX64.cfg` to add your params to the `kernel` configuration key
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05. Save your changes, unmount and dd to usb device
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Cannot start installation, installation completes successfully but then BIOS loops at boot device selection, hangs at four penguins after choosing "Test media and install Qubes OS" in GRUB menu
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---------------------
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There is some [common bug in UEFI implementation](http://xen.markmail.org/message/f6lx2ab4o2fch35r), affecting mostly Lenovo systems, but probably some others too. You can try existing workaround:
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01. In GRUB menu<sup id="a1-1">[1](#f1)</sup>, select "Troubleshoot", then "Boot from device", then press `e`.
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02. At the end of `chainloader` line add `/mapbs /noexitboot`.
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03. Perform installation normally, but don't reboot the system at the end yet.
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04. Go to `tty2` (Ctrl-Alt-F2).
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05. Enable `/mapbs /noexitboot` on just installed system. This step differs between Qubes releases:
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**For Qubes 3.1:**
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06. Execute `mount | grep boot/efi` and note device name (first column). It should be something like `/dev/sda1`.
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07. Execute `efibootmgr -v`, search for `Qubes` entry and note its number (it should be something like `Boot0001` - `0001` is an entry number).
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08. Replace existing `Qubes` entry with modified one. Replace `XXXX` with entry number from previous step, `/dev/sda` with your disk name and `-p 1` with `/boot/efi` partition number):
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efibootmgr -b XXXX -B
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efibootmgr -v -c -u -L Qubes -l /EFI/qubes/xen.efi -d /dev/sda -p 1 "placeholder /mapbs /noexitboot"
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09. Compare new entry with the old one (printed in step 6) - it should only differ in additional options at the end, and look probably something like this:
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Boot0001* Qubes HD(1,GPT,partition-guid-here,0x800,0x64000)/File(\EFI\qubes\xen.efi)p.l.a.c.e.h.o.l.d.e.r. ./.m.a.p.b.s. ./.n.o.e.x.i.t.b.o.o.t.
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If instead it looks like:
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Boot0001* Qubes HD(1,0,00000000...0,0x0,0x0)/File(\EFI\qubes\xen.efi)p.l.a.c.e.h.o.l.d.e.r. ./.m.a.p.b.s. ./.n.o.e.x.i.t.b.o.o.t.
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then try passing `/dev/sda1` or `/dev/nvme0n1p1` or whatever your EFI partition is instead of `/dev/sda` and `-p 1`.
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10. Now you can reboot the system by issuing `reboot` command.
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**For Qubes 3.2 or later:**
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11. Edit `/mnt/sysimage/boot/efi/EFI/qubes/xen.cfg` (you can use `vi` editor) and add to every kernel section:
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mapbs=1
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noexitboot=1
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**Note:** You must add these parameters on two separate new lines (one
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parameter on each line) at the end of each section that includes a kernel
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line (i.e., all sections except the first one, since it doesn't have a
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kernel line).
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12. Now you can reboot the system by issuing `reboot` command.
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System crash/restart when booting installer
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-------------------------------------------
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Some Dell systems and probably others have [another bug in UEFI firmware](http://markmail.org/message/amw5336otwhdxi76). And there is another workaround for it:
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1. In GRUB menu<sup id="a1-2">[1](#f1)</sup> press `e`.
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2. At the end of `chainloader` line add `-- efi=attr=uc`.
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3. Perform installation normally, but don't reboot the system at the end yet.
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4. Go to `tty2` (Ctrl-Alt-F2).
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5. Execute:
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sed -i -e 's/^options=.*/\0 efi=attr=uc/' /mnt/sysimage/boot/efi/qubes/xen.cfg
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or if you're installing 3.2 execute:
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sed -i -e 's/^options=.*/\0 efi=attr=uc/' /mnt/sysimage/boot/efi/EFI/qubes/xen.cfg
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6. Now you can reboot the system by issuing `reboot` command.
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* * *
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<b name="f1">1</b> If you use rEFInd, you can see 3 options regarding the USB installer. Choose "Fallback Boot Loader" to enter the GRUB menu. [↩](#a1-1) [↩](#a1-2)
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Boot device not recognized after installing
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------------------------------------------
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Some firmware will not recognize the default Qubes EFI configuration. As such,
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it will have to be manually edited to be bootable (this will need to be done after
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every kernel and Xen update.)
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1. Copy `/boot/efi/EFI/qubes/` to `/boot/efi/EFI/BOOT/`.
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2. Rename `/boot/efi/EFI/BOOT/xen.efi` to `/boot/efi/EFI/BOOT/BOOTX64.efi`.
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3. Rename `/boot/efi/EFI/BOOT/xen.cfg` to `/boot/efi/EFI/BOOT/BOOTX64.cfg`.
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Installation finished but "Qubes" boot option is missing and xen.cfg is empty
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--------------------------------------------------------------------------------------
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In some cases installer fails to finish EFI setup and leave the system without
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Qubes-specific EFI configuration. In such a case you need to finish those parts
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manually. You can do that just after installation (switch to `tty2` with
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Ctrl-Alt-F2), or booting from installation media in "Rescue a Qubes system" mode.
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1. Examine `/boot/efi/EFI/qubes` (if using Qubes installation media, it's in `/mnt/sysimage/boot/efi/EFI/qubes`). You should see 4 files there:
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- xen.cfg (empty, size 0)
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- xen-(xen-version).efi
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- vmlinuz-(kernel-version)
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- initramfs-(kernel-version).img
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2. Copy `xen-(xen-version).efi` to `xen.efi`:
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cd /mnt/sysimage/boot/efi/EFI/qubes
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cp xen-*.efi xen.efi
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3. Create xen.cfg with this content (adjust kernel version, and filesystem
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locations, below values are based on default installation of Qubes 3.2):
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[global]
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default=4.4.14-11.pvops.qubes.x86_64
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[4.4.14-11.pvops.qubes.x86_64]
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options=loglvl=all dom0_mem=min:1024M dom0_mem=max:4096M
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kernel=vmlinuz-4.4.14-11.pvops.qubes.x86_64 root=/dev/mapper/qubes_dom0-root rd.lvm.lv=qubes_dom0/root rd.lvm.lv=qubes_dom0/swap i915.preliminary_hw_support=1 rhgb quiet
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ramdisk=initramfs-4.4.14-11.pvops.qubes.x86_64.img
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4. Create boot entry in EFI firmware (replace `/dev/sda` with your disk name and `-p 1` with `/boot/efi` partition number):
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efibootmgr -v -c -u -L Qubes -l /EFI/qubes/xen.efi -d /dev/sda -p 1 "placeholder /mapbs /noexitboot"
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