Hardware :: Refuses To Boot With IOMMU Feature Enabled
Apr 21, 2011
This affects any version of Linux I have managed to put my hands on, 32 bit as well as 64 bit, except XenServer 5.6. This does not affect Windows 7 x64, GRUB bootloaders and FreeDOS/MSDOS based boot CDs. Also, Linux boots fine with the BIOS IOMMU feature disabled.What happens is that the 64-bit Linux install, bootCD, installCD, liveCD or USB hangs almost immediately after GRUB with naught but a blinking cursor at the upper left corner. Some liveCDs manage to show some kind of boot splash before it hangs. USB peripherals such as the mouse and the USB stick gets severed at the moment of the hang. The num-lock led is on but the keyboard is irresponsive to *-lock toggles.
In the 32-bit version it takes a little longer before the hang and the USB peripherals stay on at the event of the hang, but the keyboard is irrespnsive in the same manner. It also spits out error messages.
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Apr 20, 2011
I'm struggling with my computer to get it to run a Windows 7 x64 machine as domU with VGA passthrough using Xen and Fedora 14 as dom0.
The problem is that when I enable IOMMU in BIOS, it simply freezes during boot. If booting with the dom0 pvops kernel via Xen it stops at the "IOMMU enabled" message. If I boot the regular unpatched kernel without the Xen; all I see is naught but a blinking cursor at the upper left corner.
I tried booting from the Fedora 14 liveCD and the lubuntu 10.04 liveCD and they booth freeze in a simlar fashion afer I get past their bootloaders.
The Windows 7 partition boots just fine and I can do all sorts of stuff in it (such as conducting computationally intensive tasks) without problems.
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Sep 14, 2009
I have Red Hat Enterprise 5 and am trying to resize a partition. I am using the resize command within "parted" and am getting the following error - Error: File system has an incompatible feature enabled.
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Jun 7, 2011
I have my home network set up like so. My router has 4 ethernet ports so I have 1 hooked up to a network hub where I have 2 computers running windows xp and 1 running windows 95, on my other router port I have a desktop using ubuntu 11.04 and I have 2 windows 7 laptops and 1 ubuntu 11.04 laptop connecting wirelessly. All of the computers can see each other in my network map except for the ones running ubuntu. I can successfully ping every computer on my network from every computer without fail (even the ubuntu ones). The weird thing is that my ubuntu computers can see and use files from all of my windows computers but still nothing can see the ubuntu computers. I have set up samba to no avail and when I open file sharing and try to enable it on ubuntu it comes up with "this feature cannot be enabled because the required packages are not installed on your system." I have done clean installs of ubuntu 11.04 and 10.10 on both ubuntu computers and kept them up to date but the same problem persists. I have tried to do the same steps above with all of my computers wired but still nothing.
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Nov 3, 2010
I have a compaq c784tu and it was shitty with xp. Vista is quite crap, so i turned over to ubuntu 10.4. The configuration of the laptop is: 1.73 GHz Intel Pentium Dual Core Processor T2370 with 1-MB L2 Cache, 533 MHz FSB featuring Intel Mobile 945GML Express Chipset Motherboard, 2-GB PC2-5300 DDR2 667 MHz SDRAM (Maximum 4-GB in 2 slots), a 160-GB SATA 5400 rpm Hard Disk Drive and 8x Super Multi Double Layer (8.5 GB) Slot-in DVD Writer.Everything worked like a charm and I was able to connect to the internet through a public wifi network. However, I came home this week to my mothers house, where they have a dsl-router to connect to the internet whih uses bridge mode pppoe. I tried to connect to the internet through it, and it initially couldnt. However, I got around that by doing a clean install of ubuntu. I was able to then connect to the internet using "sudo pppoeconf" and "sudo pon dsl-provider"One night the network manager app on the top left disappeared and would not come on. I figured I had fried my wifi adapter, however, lspci -v confirmed its presence.Further, "system>admn>system testing" detected the adapter aswell. I tried the iwconfig command in the terminal the result was:
lo no wireless extensions
eth0 no wireless extensions
wlan0 IEEE 802.11bg ESSIDff/any
[code].....
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Oct 11, 2010
I would like to enable personal file sharing so I can access my laptop (hp Mini laptop w/ ubuntu) from my mac mini (OSX 10.4.11), but the message I get in PFS dialogue box is "This feature cannot be enabled because the required packages are not installed on your system".
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Mar 9, 2010
Does anyone know what happened to the Multiseat feature that had been in the feature list at one point?To briefly summarise, a single machine with multiple graphics cards, sound cards, keyboards & mice provides multiple seats for users. Each user gets their own monitor, keyboard, mouse & perhaps audio. The rest of the machine resources are then shared.
The last I saw on the topic was this discussion, although I have a recollection that there was going to be support in a newer version of X.Org. I've googled around quite a bit, but can't seem to find anything.
Anybody know anything? It would be a great feature to have and it's frustrating to have had such an omission since F8 :-o
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Feb 12, 2010
I have been using Ubuntu Netbook remix for a while and have been pretty happy with it. Over the weekend, the software did a typical update, and the next time I started the computer it goes straight to the GRUB command line. On the same day, I installed ATanks, so I am not sure which caused the problem, but I really don't see the game causing a problem with the boot loader.Installed through Wubi.v. 9.10Dual boot w/Windows; no problems booting until now.I do not know which updates were installed and cannot boot into Ubuntu to find out.At the GRUB command prompt, I tried to boot, but it did not load anything other than vmlinuz; when i searched to make sure I entered the correct partition (/dev/hda2), I noticed that, well, there were no partitions in /dev
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Apr 24, 2010
I've used Windows Vista and Windows XP for quite a while before I decided to swap XP for Ubuntu (mainly for the performance). After formatting the drive, where XP was, and installing Ubuntu 9.10 I've discovered that I can't boot into my Vista any more. I used to use a Windows 7 boot loader to switch between Vista and XP (I had Windows 7 installed before Windows Vista) and now it's gone.
I've tried to boot using the GRUB2 that Ubuntu 9.10 uses but I failed. At first it gave me a "no such partition" error whenever I tried to boot it, but after some changes I managed to get it to go in to some sort of a black screen. But it's as far as it goes.
I have also tried to repair the Windows boot with a recovery disc. Unfortunately I get a "The volume does not contain a recognised file system." error whenever I try to import the bcd.temp file using bcdedit.exe
I really need Vista back up since it has PhotoShop on it and all other things that I need in order to continue working on my schoolwork, which has to be done in a couple of days.
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Oct 2, 2010
Have a 4.1 Macbook. Tried to install Ubuntu 10.4 on it. Looked at everything I can find to no end. Downloaded rEFIt, didn't help just comes up with black screen and blinking line.Then tried to boot it through Virtualbox, get an error about my Intel core not being capable of 64 bit, called apple they said that it is and the version i downloaded was the Ubuntu 32 bit anyway
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Nov 16, 2009
Sometimes, when I need to affect some quick changes on my box, I boot up in runlevel 1 by adding "single" to my kernel line in the Grub menu. I use Grub because I also have Vista+RHEL+CentOS for operational reasons and then Slack for everything else.Since I upgraded to Slack13 I noticed that this was not working. I assumed that it was because I had installed on a encrypted LV, so I tried it on VirtualBox installs. I tried both on GRUB and LILO on the Virtual Slack. I tried both the 32 and 64 bit versions. It does not work.
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Dec 25, 2010
I've upgrade my hardware configuration up to 4GB of RAM. Today I've found some problems with my Ubuntu 10.10, like music stops playing or file system that became read-only. I've found this errors messages running dmesg:Code:PCI-DMA: Out of IOMMU space for xxx bytesI've tried to add "iommu=memaper=3" and "iommu=noaperture" to boot options as found with google, but problem still remains.
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Apr 11, 2011
At boot time I get asked to input my password to open the keyring. I don't need this level of security and want to either pass the password in a script or disable the keyring without disallowing my wireless connection. How do I do that and where do I find out about this keyring thing?
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Feb 5, 2010
Kmix refuses to show in the system tray at boot. I have gone to settings and made sure "Dock in system tray" is ticked off. I have un-installed and re-installed it. Nothing. btw running Suse 11.2 and the desktop is kde 4.3.1
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Jun 21, 2010
I have a 9.10 fully updated install on an old P4 HP desktop that otherwise runs flawlessly. We moved it to the bedroom to use as a media center and when I plug in a Thermolake toaster with a Hitachi 750G SATA drive it is recoginized and available no problem. I can read/write no problem. It works via nfs4 no problem. The issue is if I reboot while the drive is attached it the machine refuses to reboot and hangs on the initial hardware screen not even showing a grub screen. This has always been a native ubuntu machine with no dual boot or any weird grub2 issues previously. Interestingly, I am getting the exact same issue with another HP desktop (Celeron machine) with 9.10 Server 32bit that I' using as a home server. This is obviously a bigger problem because if the server updates or requires a reboot for any reason I can't just leave the drive attached. This drive houses our movie and music collection.
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Jan 20, 2011
When I boot my computer (emachines E528 laptop), it gets to the BIOS loading screen (the one where you have the option to press a function key to get to the BIOS settings), then it goes to a black screen and looks like it is going to load GRUB, but instead of loading GRUB, the computer reboots. It does this endlessly, unless I insert a LiveCD. So, it's not the BIOS. That's good. When the Mint GUI (Linux Mint was the LiveCD I was originally using as I just happened to have it on hand) loaded for the first time, I checked all of the hard drive partitions and they all seemed to load fine. So, it's not a mechanical problem with the HDD. That's good.
At this point, I figured the MBR had become corrupted somehow. Now I wasn't really sure exactly where the MBR was, or how it all worked, but I was pretty sure that if I just reinstalled GRUB, everything would be hunky dorey. Unfortunately, I hit a road block when trying to install GRUB. That's not good. I am trying to follow the instructions in this thread, but I get the following error:
Code:
grub> find /boot/grub/stage1
Error 15: File not found
So then I tried following the instructions here, but I don't know how to tell which drive is sda1, sda2, etc. I'm guessing there's some terminal command to figure it out, but I don't know it and Google was less than helpful. I feel like something that basic should be easy to find, but I digress.i am getting very close to backing up everything and reinstalling everything. Only problem with that is that I am not sure how to access the files on my Ubuntu partition as they are encrypted (I wrote down the key when I started it up, I just don't know how to bring up a prompt that will let me enter the key). I really don't want to reinstall and set everything back up, but if I have to I will. how to tell which partition is associated with which sda#, or how to access the files in my encrypted Ubuntu home folder. How do I tell which partition is associated to which sda#? How do I open my encrypted home folder from my Ubuntu partition?
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Aug 4, 2011
first, sorry for my bad english, I am german I have a problem enabling IOMMU on my MSI 970A-G45 mainboard. I need the IOMMU support for PCI passthrough in KVM ( I need my DVB pci cards in the virtual machine).
I have installed Ubuntu server 11.04 and enabled IOMMU in bios. The first strange thing is, that when iommu is enabled in the bios i cant access network or USB devices in ubuntu. Only when its disabled in bios.
Well, i tried the tutorial from here: http://www.linux-kvm.org/page/How_to...th_VT-d_in_KVM and compiled a new kernel with "Support for DMA Remapping Devices", "Enable DMA Remapping Devices" and "PCI Stub driver" enabled and installed it (based on description in wiki)
[Code]...
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Jun 17, 2009
I installed F11 x86 from the DVD onto one of my machines using a total of 4 partitions:
1. /boot
2. /
3. /home
4. swap
I then created an image of the first 3 partitions with fsarchiver and restored it onto a second machine (with different hardware). Grub was loaded onto the second machine as well without a problem. The new cloned install will get past grub fine but the kernel hangs. After removing 'rhgb quiet' from the boot options, I can see that the last message outputted to the console is something about the PS/2 mouse - this doesn't make sense as the mouse is working perfectly fine.
Additionally, I can still reboot using ctrl-alt-delete so the kernel/CPU must still be responsive. I have tried troubleshooting the various pieces of hardware, so I'm guessing it's something with the clone. All the cloned filesystems appear to be fully intact; the partition UUID's are all the same. I've even tried changing the UUID's both in grub and /etc/fstab to hardcoded /dev/sdaX , but this does not fix anything.
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Feb 28, 2011
I have been running a dual-boot, Windows 7 and Ubuntu 10.10 system with the disks set for IDE with no problems. I have just attempted to change the disk system to AHCI and, whilst I can boot into Windows 7, I am unable to boot into Linux and get the error: "Alert! /dev/disk/by-uuid/5d773307-a046-40fa-ba29-728611bc7eed does not exist" I am new to Linux so am unsure where to go from here. I have reverted to IDE for the moment and it boots Ok.
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Oct 12, 2010
In understanding with Fedora logs are trying to tell me and if I need to adjust some settings on my system to address these issues.
The system motherboard (Gigabyte GA-MA785GT-UD3H) has onboard graphics. I understand that some of the system RAM is taken up by the graphics subsystem.
Very occasionally, I am seeing Nautilus and some other apps crash with SIGSEGV errors. Also, on the couple of occasions, parts of the display started going black - minimising and maximising the window redrew the area as before. This appears to be to do with memory access issues. I have already tested my RAM, applied the latest BIOS update on the mobo. I'm trying to understand if this is some sort of memory access violation that is resulting from the Linux kernel going off and accessing the wrong parts of the RAM and if there is a way to tell it that the graphics and system areas of the RAM are separate, through BIOS settings or kernel parameters and such?
Some questions:
1. Is my system using AGP? I don't think so. I understand AGP is on its way out. So what does the below log output mean wrt AGP?
2. Which part of the log is actually describing the memory assignment for the graphics memory?
3. Would it be of any use trying iommu=noaperture here? I am trying this out, but I don't understand if it is helping in anyway.
Have done a Google search and read on AGP, iommu, shared memory for graphics, but their interaction with each other at the hardware level and how Fedora is handling this is not sinking into my dull brain.
I have put up the system configuration, BIOS settings, logs etc for your perusal here [url]. Parts that caught my attention are highlighted.
Now, onto the bits that has my attention:
Code:
Code:
Code:
No AGP bridge found
Code:
Code:
Code:
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Apr 10, 2015
Since users need to disable secure boot to install Debian but can you enable after its installation?
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Apr 11, 2011
I have an old laptop (asus M6 ca. 6 year old) with dual boot linux windows. Untill Saturday linux=suse 11.0, Saturday I have made an upgrade to opensuse11.4.
I have boot up/down many times almot everything was working properly except the battery status ... I have thought .. "I'll think about it later".
Then out of the blue on sunday my laptop does not boot anymore, the boot hangs. I then have realized taht the failsafe boot was working properly.... ok I have remembered the wrong battery signal and tried the normal boot + acpi=off .. and .. it boots!
OK, the acpi is the problem. I have never made an update of my BIOS (this means it is now old), but I do not really want to update it now. with suse 11.0 the acpi was working properly, I have never have touched the acpi boot option and I had all acpi functionality working (battery, suspend .. etc)
how to let acpi work (at least for the main features .. batetry, fan speed, HT ... etc)?
It can be that the old kernel boot was using some "specific flags", (an installation is cleverer than an upgrade ..?!?!) but unfortunatelly it looks to me that nothing has remained from the old installation .. so I do not know ...
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Nov 7, 2010
I have a USB stick with a mechanical write protection (a small switch that disables writing on the stick). I have installed Ubuntu 10.04.1 on this device usung the startup drive creator. If the switch is in the position that allows writing, Ubuntu boots as expected. But if I switch to write protection, I only see a blinking cursur. Because it is a live system on the stick I expected that it should work as well, because nothing should be written to the stick. Does anyone have an idea why it behaves like this and how I can change it?
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Sep 29, 2010
I have 4GB of memory but i just found that if i enable Software/Hardware remapping in the bios the bios will then show all 4GB usable from 2.5GB but then Ubuntu refuses to boot up saying a kmiser type message but it will if i disable those 2 options. is there any way to fix it apart from reinstalling ubuntu?
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Oct 3, 2015
debian 8 64bit
Should bios setting be eufi or legacy?
Should secure boot be enabled?
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Aug 18, 2009
I have a Fedora 11 PC, which I want to connect to the ldap server at my organisation. When my /etc/ldap.conf file is in place, the machine will not boot past "starting system messagebus" and just hangs there. I have to press the reset button, and boot it into single user mode, and remove /etc/ldap.conf, and only then will it boot. The ldap.conf file is fine, I think, because if you boot the machine up without ldap.conf, then log in.
I can put ldap.conf in place and immediately I can see all the user accounts etc. from the ldap server. If I then reboot, with ldap.conf in place, it hangs on boot again. I found a bug report for FC5 which stated this problem, but there was no solution. There was a workaround, making messagebus starting later in the boot process (move it from S22 to S27 in rc3/5.d), but that didn't help in my case.
My ldap.conf contains this (I've removed my actual ldap info):
host my.server.ip.addr
base dc=my,dc=dn
uri ldap://ldap.mydomain.com
ssl no
tls_cacertdir /etc/openldap/cacerts
pam_password md5
bind_policy soft
As I say, I think the ldap config is fine, because you can start it manually once the machine has booted up without an ldap.conf in place. I lifted it from a Centos client, which works fine and doesn't have the same problem with booting that Fedora does.
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Aug 4, 2011
System: F15-64bit, Intel Core i7 on Asus P6T mobo. I've upgraded to 2.6.40, and I'm regretting it!While 2.6.38 still works fine (apart from the usual random panics), 2.6.40 gives errors on boot, and reliably panics soon after login. Early in the boot I get the message "IOMMU: mapping reserved region failed" 8 times. Then boot appears to proceed as normal, at least once the nvidia blob is removed in favour of Nouveau (otherwise, forget it...).
After graphical login, the system freezes within a couple of minutes.After a text login, the system freezes within seconds with a panic, starting "BUG: Scheduling while atomic: swapper". A forum search for the IOMMU message leads to https://fedoraproject.org/wiki/Commo...IOMMU_handling but this talks about old 32-bit releases without BIOS virtualization support.
[Code]...
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Feb 20, 2010
I'm a recently proud owner of a new Aspire AS3810T with Fedora 12 installed, when it boots up before entering the boot screen when it loads I see this error message:IOMMU: Mapping reserved region failedHow can i fix this error? It's quite frustrating
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Jun 10, 2010
after upgrading to with preupgrade to F13 when trying to login via ssh from a windows machine using putty the following SElinux error message occurs: SELinux refuses /usr/sbin sshd "entrypoint" access on /bin/bash ( this is retranslated from german so maybe no fully exact).
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Mar 2, 2009
i've been using foxit pdf reader on Windows for sometime now, on Fedora i can't find any pdf reader that has tab feature so i can use only one window because i get to open a few pdfs at one time.
I have tried installing Foxit under WINE but scrolling through the pages takes forever
anyone know of any good pdf reader that has tab feature? i'm surprised that the outcomes of my searches haven't brought up a single Linux pdf reader that has tab feature...
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