Bug 173904 - Kernel hangs/reboots after "Write protecting the kernel read-only data"
Kernel hangs/reboots after "Write protecting the kernel read-only data"
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Dave Jones
Brian Brock
Depends On:
  Show dependency treegraph
Reported: 2005-11-22 09:09 EST by Andy Burns
Modified: 2015-01-04 17:23 EST (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-12-01 02:22:23 EST
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
debug kernel log (13.67 KB, text/plain)
2005-11-22 09:09 EST, Andy Burns
no flags Details

  None (edit)
Description Andy Burns 2005-11-22 09:09:33 EST
Description of problem:

Version-Release number of selected component (if applicable):

How reproducible:
Happens every time at boot up

Steps to Reproduce:
Actual results:

System sometimes reboots immediately, sometimes hangs for a couple of minutes
and then reoots, the last kernel logging is "Write protecting the kernel
read-only data"

Expected results:
Kernel starts successfully

Additional info:

FC4 instals and runs ok on this machine but didn't recognise onboard Intel e100
NIC) Hans Kristian Rosbach's "unofficial FC4.1" was new enough to install and
recognise the NIC and I could then yum it up to the latest FC4 patches without

tried BIOS settings for SATA drives as AHCI and IDE (installer seemed happy with

tried BIOS settings for ATA/IDE mode as Enhanced and Legacy (installer seemed
happy with enhanced)

tried BIOS settings for HT enabled and disabled (installer seemed happy with HT,
installed smp kernel)

Hardware Specs:
Intel D945GTP motherboard, BIOS v3191
P4 3GHz SL7Z9
Radeon X550 PCIe
2x 512MB 667MHz DDRII 4-4-4-12
2x WesternDig 250GB SATA
1x LiteOn DVD-RW LDW-411S
2x Compro Videomate DVB-T200 tuners
Comment 1 Andy Burns 2005-11-22 09:09:36 EST
Created attachment 121348 [details]
debug kernel log
Comment 2 Andy Burns 2005-11-22 20:21:04 EST
Thanks to davej for the suggestion to boot with the kernel option
"mem=nopentium" which acts as a workaround, also in future kernels >=
2.6.14-1.1707_FC5 try the "nowprodata" kernel option which disables the write

Comment 3 Dave Jones 2005-12-01 02:22:23 EST
should now work in rawhide without any special boot options at all.

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