Red Hat Bugzilla – Bug 450247
Xorg fails to start with 4GB or greater
Last modified: 2009-07-14 14:05:13 EDT
Description of problem:
Asus P5E-VM-HDMI motherbard, using onboard G35 GMA with HDMI output, Xorg works
when machine has 1GB memory installed, fails with 4GB or 8GB.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. install 4GB or more of memory
2. boot machine with rhgb enabled
With the extra memory, the machine boots, the text console displays ok, xorg
starts for rhgb and is displayed ok, when xorg restarts for gdm, the display is
left full of blocks of "random" pixels and xorg crashes, the machine however is
not dead and will respond to ctrl-alt-del, or to ssh.
onboard graphics are usable with any amount of memory
It seems this occurs only on the *second* time of initialising xorg, perhaps it
is the shutdown of xorg which is the problem?
If rhgb is enabled, the instance of xorg for rhgb succeeds, then the instance of
xorg for gdm fails.
If rhgb is disabled, then the first instance of xorg runs for rhgb and it
succeeds, but if it is killed it will not restart.
If the machine is started in runlevel3, then the first startx succeeds, but if
that is killed, a second startx fails.
Created attachment 308513 [details]
Xorg.log showing failure
Created attachment 308514 [details]
Xorg.log showing succesful start
Created attachment 308515 [details]
dmesg from machine
Comment on attachment 308515 [details]
dmesg from machine
changed mime type to text/plain
i can confirm this problem with a radeon hd 2400 pro (rv610) card
i also opened a bug https://bugzilla.redhat.com/show_bug.cgi?id=450432
should we close one?
but i have got the 32bit version of fedora installed
Although they both seem related to 4GB memory, on my machine with the intel
driver it crashes xorg, yours with the radeon driver reboots the machine (kernel
I'd rather see some comment from an ajax and/or arlied before closing either of
I found out something more about this problem.
could this be an mtrr problem?
i have attached a dmesg file and my gdm log in both there are mtrr problems like:
error setting MTRR (base = 0xf0000000, size = 0x08000000, type = 1) Invalid
Created attachment 309037 [details]
gdm log file
Created attachment 309038 [details]
dmesg log file
i found a solution for my problem. i dont know if this is a nice idea...
i disabled the memory remap feature in my motherboard bios.
ofter that my ati radeon 2400 pro works
I have this problem on a Dell Optiplex 745. Didn't realize it was a 4GB problem.
I'm reasonably sure I'm seeing this bug, rather than bug #450247.
- machine locks hard on spawning of second X server (first is fine), e.g. GDM after RHGB; if I turn RHGB off it crashes if log out - which restarts X
- 4GB RAM
- Radeon HD 2400 XT
- Dell Optiplex 755
I also see:
error setting MTRR (base = 0xd0000000, size = 0x10000000, type = 1) Invalid argument (22)
in my GDM log, and:
Aug 29 13:58:17 keyop kernel: mtrr: type mismatch for d0000000,10000000 old: write-back new: write-combining
I've updated to the latest available BIOS. I can't find a memory remap feature in the BIOS. It'll be tricky to test removing a stick of RAM (but possible if needed) - I'll have to get alarms disabled etc.
I'm running a vaguely usable machine by disabling RHGB - as long as I don't log out!
Ha. I meant, of course, that I see more in common with this bug than bug #450432.
My Bug report in #455127 seems to have the same problem. I also have the same motherboard and 4G of ram as the original reported.
This has been resolved for me since I applied the latest F9 updates. I can't see an xorg package amongst them, so I think it must be the kernel update that fixed it (to kernel-126.96.36.199-29.fc9.x86_64).
Booting back into kernel-188.8.131.52-108.fc9.x86_64 causes the crash again.
I am having this problem again with kernel-184.108.40.206-45.fc9.x86_64. I can run X exactly once between reboots. Optiplex 745.
As a workaround, try limiting memory to 4GB with the kernel option 'mem=4096M' in grub.conf.
Looks like a lockup in drm.
In case it helps narrow the problem down: just to note that I'm *not* experiencing the problem again having rebooted into kernel-220.127.116.11-45.fc9.x86_64. An Optiplex 755 with Radeon HD 2400 XT and 4GB RAM. I'm not using any kernel mem= options.
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