Red Hat Bugzilla – Bug 483623
Intel GMA4500 dvi/vga support
Last modified: 2011-10-16 00:34:24 EDT
Created attachment 330647 [details]
State the problem
The client have a Lenovo ThinkCentre M58p with a chipset q45 and a intel GMA 4500 video card. When using the Intel video driver his computer gets most of the time a blank screen and the cpu fans appears to increase to full speed. He is also experiencing what it appears to be the bug #476831.
1. Provide time and date of the problem
2. Indicate the platform(s) (architectures) the problem is being reported against.
3. Provide clear and concise problem description as it is understood at the time of escalation
* Observed behavior
The Intel driver is not able to use the DVI output only the VGA output works.
When using the VGA output the system gets a blank screen and the cpu appears to get a peak since the fans get to full power.
When using the vesa driver every thing works fine.
* Desired behavior
For the Intel driver to work with the DVI output and for the system to be able to properly display the video using the VGA connection.
4. State specific action requested of SEG
Investigate that the DVI problem that is referred by the bug # 476831 is relevant.
Verify what is causing the system to display the blank screen with the vga output.
5. State whether or not a defect in the product is suspected
* Provide Bugzilla if one already exists
6. If there is a proposed patch, make sure it is in unified diff format (diff -pruN)
8. This is especially important for severity one and two issues. What is the impact to the customer when they experience this problem?
The client will be upgrading 20 desktops with this model during the first half of 2009 and need to be able to use a higher resolution then the ones that are available by the vesa driver.
This appears to be the same bug as IT 250320 /BZ 476831
Created attachment 331238 [details]
dmesg from sosreport
Created attachment 331239 [details]
messages from sosreport
Created attachment 331240 [details]
xorg.conf from sosreport
Created attachment 331241 [details]
Xorg.0.log from sosreport
Can confirm this bug on the same hardware. Some more details:
The failure seems to occur on X start. This has happened when booting from CD to install, when first entering runlevel 5, or when logging out and gdm restarts X. Switching to the "vesa" X driver (rather than "intel") restores stability. Minimal xorg.conf as generated by the install.
It is not a 100% thing. The first machine I tried had about a 50% failure rate. The one I'm trying to install now has worked once out of about 8 tries. Smells like a race condition which might be hardware timing dependent.
When the driver fails, not only does the screen go black and the fans speed up to max, but the machine powers off. Pretty hard - /var/log/messages lists the last thing happening as the desktop's gconfd exiting, then the restart when I reach over and power the box back on. Yay for journaling file systems.
The fan speeding up thing is a lenovo bios feature, many lenovos ramp the fans to max speed temporarily upon power on as a functionality check, although this desktop model does not. So I suspect that this is a red herring, unless it's a hint as to what BIOS call is being thwacked to cause the powerdown.
Is there a verbosity switch I could set on the intel driver that might shed more light on the situation?
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Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
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No capacity for this.
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated in the
current release, Red Hat is unfortunately unable to address this
request at this time. Red Hat invites you to ask your support
representative to propose this request, if appropriate and relevant,
in the next release of Red Hat Enterprise Linux.