I have the same problem on Ubuntu 20.04 with a ATI Radeon HD5770.
Setting VDPAU_DRIVER=none works here, too.
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https://bugs.launchpad.net/bugs/1927773
Title:
Can't play video X.
If you had read my last comment, you would have noticed that the issue
has been resolved already. I could not close it unfortunately, because I
don't see a close button.
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xserver-xorg-core 1.13.0-0ubuntu6.1 fixes the issue for me on a Clevo
W210CUQ ("Intellibook").
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https://bugs.launchpad.net/bugs/1069031
Title:
intel gma3600: X unable to sta
The second display works again on Ubuntu 12.10, kernel 3.5.0.
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https://bugs.launchpad.net/bugs/914437
Title:
Second display not recognized anymore; "EDID checksum
get-edid does not show the EDID of the monitor with the broken EDID.
Booting 11.04, the monitor *works fine*. Nontheless dmesg shows the
following, which is nearly the same as on 11.10 and 12.04:
[ 39.328047] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 254
[ 39.
** Attachment added: "read-edid | xxd"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/914437/+attachment/2689171/+files/read-edid-xxd
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htt
Related if not the same:
https://bugzilla.redhat.com/show_bug.cgi?id=533632
** Bug watch added: Red Hat Bugzilla #533632
https://bugzilla.redhat.com/show_bug.cgi?id=533632
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The problem also occurs on the Fedora 16 live CD (kernel
3.1.0-somtething).
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https://bugs.launchpad.net/bugs/914437
Title:
Second display not recognized anymore;
This still happens on today's live cd/usb of 12.04 (precise):
[ 66.354209] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 254
[ 66.354211] Raw EDID:
[ 66.354212] ff ff ff ff ff ff ff ff 4d d9 50 1e 01 01 01 01
[ 66.354213] 01 0c 01 02 0e 1e 17
Booting the system with both displays attached shows only the working
monitor in the display settings.
When booting the system with only the non-working monitor attached
actually shows the desktop on the non-working display, but in a wrong
resolution - and the display settings application does no
** Attachment added: "display settings with both monitors connected"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/914437/+attachment/2682245/+files/2012-01-19%20display%20settings.png
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https://bugs.launchpad.net/bugs/914437
Title:
Second display not recognized anymore; "EDID checksum is invalid"
To manage notifications about this bug go to:
htt
Public bug reported:
After upgrading from Ubuntu 11.04 to 11.10, the second display is not
recognized anymore.
It's an amd64 system with a Radeon HD 5700 graphics card.
The first display, a Samsung P2250, connected via DVI, is recognized flawlessly.
The second display, a Sony SDM-S51, connected w
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