Ubuntu
xserver-xorg-video-ati package

External monitor not working Radeon Mobility M6 LY after a regular Edgy update

Bug #67183 reported by Greg Wilkins
2
Affects Status Importance Assigned to Milestone
xserver-xorg-video-ati (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

On my thinkpad a30p running edgy an update about
a week ago stopped the external monitor from working.

This notebook has run hoary, dapper and early versions of edgy without a problem.

Now, an external monitor, such as a projector or LCD screen will detect signal from the notebook and even correctly see the resolution and frequency - but the screen is always black (in X). During boot and in text consoles, the second display works correctly.

If I boot with the second display attached - both screens end up black and I cannot switch between either.

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY (prog-if 00 [VGA])
        Subsystem: IBM ThinkPad A30/A30p (2652/2653)
        Flags: bus master, stepping, fast Back2Back, 66MHz, medium devsel, latency 66, IRQ 11
        Memory at e0000000 (32-bit, prefetchable) [size=128M]
        I/O ports at 2000 [size=256]
        Memory at c0100000 (32-bit, non-prefetchable) [size=64K]
        [virtual] Expansion ROM at c0120000 [disabled] [size=128K]
        Capabilities: <access denied>

Revision history for this message
Greg Wilkins (gregw-mortbay) wrote :
Revision history for this message
Alex Muntada (alex.muntada) wrote :

Somehow, this could be related to bug #32461.

Can youn please attach your last /var/log/Xorg.0.log?

Thanks!

Changed in xserver-xorg-video-ati:
assignee: nobody → alex.muntada
status: Unconfirmed → Needs Info
Revision history for this message
Greg Wilkins (gregw-mortbay) wrote :
Revision history for this message
Greg Wilkins (gregw-mortbay) wrote :

I don't think this is the same as bug #32461
I can ctl-alt-F1 and ctl-alt-F7 as expected.

But if I fn-f7 to cycle between the external display modes, the external monitor either sees no signal or sees a signal, but has a black screen.

It does sound a little similar to https://launchpad.net/distros/ubuntu/+source/xserver-xorg-video-ati/+bug/27466
but I am unable to run fglrx on my video card.

Revision history for this message
Alex Muntada (alex.muntada) wrote :

Bug 27466 is related to DVI only. Is your external screen attached through DVI?

I'd say they're different issues since bug 27466 never worked and you say that your screen was working before in hoary, dapper and earlier versions of edgy. Can you confirm this, please?

Revision history for this message
Greg Wilkins (gregw-mortbay) wrote :

I can confirm that my external monitor was working on hoary, dapper and early versions of edgy.

I had updated edgy in late September and the external screen was definitely working on the 4th of October. I updated several times after that and when I went to use the external monitor on the 18th, it was not longer working - with the symptoms I describe above - which indicates to me a software rather than hardware issue.

Alex Muntada (alex.muntada)
Changed in xserver-xorg-video-ati:
assignee: alex.muntada → nobody
status: Needs Info → Confirmed
Revision history for this message
Dag Stenstad (dag-stenstad) wrote :

I'm seeing the same behaviour on my ThinkPad T42 with ATI Technologies Inc Radeon Mobility M7 LW running Edgy.

If memory serves me right, I usually get this behaviour when the external (VGA) screen is plugged in at boot. If I plug in the external screen after X has started up, I get a cloned display.

However, there is some regression wrt the cloned display; xv overlays now only get displayed on the internal LCD, and not on the external screen. This used to work on Dapper, but I remeber I sometimes had to restart X to get the overlay/external screen to work properly.

Fallback for me is to do video scaling using gl. And reboot my laptop a lot.

Revision history for this message
Greg Wilkins (gregw-mortbay) wrote :

Sorry but I traded in my a30p for a z61p - so I now can't help with any debugging of any fixes.

Revision history for this message
Alex Muntada (alex.muntada) wrote :

Since you won't be able to provide further details, we are now going to close the bug. Please reopen if any of you (Greg or Dag) have more information at hand that could help with this issue.

Thanks for reporting!

Changed in xserver-xorg-video-ati:
status: Confirmed → Rejected
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