Good news -- Daniel Vetter from the upstream maintainers list responded
to the email with the more descriptive SUBJECT.
He wrote:
Still a flash bug. This commit simply enables rgb555 in the kernel,
which sna likes to use on gen2/3. Flash is just too dense and always
presumes xrgb8888.
Adding
Section "Screen"
Identifier "igd"
DefaultDepth 24
EndSection
to your xorg.conf will work around.
-------------
And doing so here did successfully work around the behavior for the
machines I reported on.
I note for other users that just the snippet above in an otherwise blank
xorg.conf will do. And many users, like me, will have no existing
xorg.conf but will have to create one, such as I did at
/etc/X11/xorg.conf (though there are many other locations where X will
find the file).
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https://bugs.launchpad.net/bugs/1212455
Title:
8086:2562 Flash 11.2 content displays in shades of green and purple
only, and in a horizontally compressed space
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
In my testing with the Intel driver using its default acceleration, what
works:
- Flash 11.2 works on Quantal with the 3.5 kernel
- Flash 11.2 works on Raring with the 3.5.0-17 kernel (though it boots to a
low-res desktop with a frozen pointer)
- Flash 11.2 works on Raring also with the 3.6.11-030611 or 3.7.10-030710
mainline kernels
- Flash 11.2 works on Raring with the 3.8 kernel (in Chrome)
what fails:
- Flash 11.2 fails on Raring with the 3.8 kernel
- Flash 11.2 fails on Raring with the latest mainline kernel, 3.11.0-031100rc5
- Flash 11.2 fails on Saucy alpha 2 with its default kernel
Disabling Flash *hardware* acceleration altogether (via R-click in the
Flash display window: Settings: General tab) did not fix the problem.
WORKAROUND: Setting the Intel driver's acceleration method to UXA
rather than its default SNA *always* fixes the Flash problem, but
causes a garbled login screen under LightDM that so far has no
workaround.
I also tried one possible fix for the default Intel SNA acceleration using
the TearFree option. I created /etc/X11/xorg.conf.d/20-intel.conf with
contents:
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
Option "TearFree" "true"
EndSection
But this had no effect.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-image-3.8.0-27-generic 3.8.0-27.40
ProcVersionSignature: Ubuntu 3.8.0-27.40-generic 3.8.13.4
Uname: Linux 3.8.0-27-generic i686
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: user1 1467 F.... lxpanel
CRDA: Error: [Errno 2] No such file or directory: 'iw'
CurrentDmesg:
[ 72.390428] serial8250: too much work for irq17
[ 72.401696] serial8250: too much work for irq17
[ 72.411724] serial8250: too much work for irq17
[ 82.046726] serial8250: too much work for irq17
Date: Wed Aug 14 17:39:10 2013
HibernationDevice: RESUME=UUID=8adf1633-c1a8-4392-8fc3-44369bc85692
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: Dell Computer Corporation Dimension 2400
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-27-generic
root=UUID=a41f2f68-7642-46f9-88d8-08a656c1c40d ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.8.0-27-generic N/A
linux-backports-modules-3.8.0-27-generic N/A
linux-firmware 1.106
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/02/2003
dmi.bios.vendor: Dell Computer Corporation
dmi.bios.version: A05
dmi.board.name: 0F5949
dmi.board.vendor: Dell Computer Corp.
dmi.board.version: A01
dmi.chassis.type: 15
dmi.chassis.vendor: Dell Computer Corporation
dmi.modalias:
dmi:bvnDellComputerCorporation:bvrA05:bd12/02/2003:svnDellComputerCorporation:pnDimension2400:pvr:rvnDellComputerCorp.:rn0F5949:rvrA01:cvnDellComputerCorporation:ct15:cvr:
dmi.product.name: Dimension 2400
dmi.sys.vendor: Dell Computer Corporation
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