Bug 40666 – GRUB Error: "Disk filter writes are not supported in boot"

Bug 40666 - GRUB Error: "Disk filter writes are not supported in boot"


Summary:	GRUB Error: "Disk filter writes are not supported in boot"

Status:	CLOSED FIXED

Product:	Z_SDB
Classification:	Unclassified
Component:	New entries
Version:	unspecified
Hardware:	Other Linux

Importance:	P5 normal
Target Milestone:	---
Assigned To:	Janek Walkenhorst
QA Contact:	Sönke Schwardt-Krummrich

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2016-02-15 17:05 CET by Janek Walkenhorst
Modified:	2023-03-25 06:46 CET (History)
CC List:	0 users

See Also:
What kind of report is it?:	---
What type of bug is this?:	---
Who will be affected by this bug?:	---
How will those affected feel about the bug?:	---
User Pain:
Enterprise Customer affected?:
School Customer affected?:
ISV affected?:
Waiting Support:
Flags outvoted (downgraded) after PO Review:
Ticket number:
Bug group (optional):
Max CVSS v3 score:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.

Description Janek Walkenhorst

2016-02-15 17:05:42 CET

Bug #26763 added/activated the "savedefault" option by default. This requires GRUB to write to the disk, which is not supported for every type of device (e.g. mdadm-software-RAID)

If GRUB can not write to the disk it displays the message
"Disk filter writes are not supported in boot"
and requires a key press to continue the boot.

As the function does not work if GRUB can not write the "savedefault" option can be disabled by
$ ucr set grub/savedefault=false

Comment 1 Janek Walkenhorst

2016-02-17 12:37:11 CET

<http://sdb.univention.de/1357>

Comment 2 Sönke Schwardt-Krummrich

2016-02-19 11:42:59 CET

Fixed and verified.