On Fri, 09 Dec 2011 21:20:08 +0800
Ed Greshko wrote:

> The characters are just "suddenly" not
> there.

Do you have an ATI card? Could be this bug:

https://bugzilla.redhat.com/show_bug.cgi?id=708529
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On 12/09/2011 10:02 PM, Tom Horsley wrote:
> On Fri, 09 Dec 2011 21:20:08 +0800
> Ed Greshko wrote:
>
>> The characters are just "suddenly" not
>> there.
> Do you have an ATI card? Could be this bug:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=708529

No ATI, nVidia. :-(

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On 12/09/2011 01:32 PM, Ralf Corsepius wrote:
> On 12/09/2011 01:16 PM, Ed Greshko wrote:
>> On 12/09/2011 07:29 PM, Ralf Corsepius wrote:
>>> On 12/09/2011 12:14 PM, mike cloaked wrote:
>>>> Although I use Thunderbird (8 and 9) I don't use Chinese chars - but
>>>> I do have a rendering problem that is quite frustrating and I hope
>>>> this is not hijacking your thread -
>>> I think your problem is a different problem
>>>
>>>> When composing with html formatting - there are many times in the
>>>> compose window that a line will blank out with often some red uneven
>>>> lines along it - moving the cursor back up and removing a character
>>>> and retyping it will often fix the rendering and everything is fine
>>>> again - this has been happening for quite a long time with TB 8 and
>>>> also 9 but I don't know if this is being worked on for a fix - anyone
>>>> else seeing this or am I alone?
>>> You are not alone ... I am experiencing this as well and can't deny to
>>> find it very annoying.
>>>
>>> I am guessing the cause is a malfunction in TB's spellchecker, may-be in
>>> combination with a bug in the X11 server, but I am not sure about it.
>>
>> I read this after responding to Mike's response.... I think you are
>> probably on to something with the X server and/or video driver/HW. It
>> may be helpful to know if you and Mike have similar HW?
>
> My GPU is (lspci output)
>
> 1:00.0 VGA compatible controller: nVidia Corporation G84 [GeForce 8600
> GT] (rev a1)
>
> Currently using:
> xorg-x11-drv-nouveau-0.0.16-27.20110720gitb806e3f.fc16.x86_64
> under xfce.

FWIW: Switching to nvidia's proprietary driver seems to have resolved
this issue for me - At least this problem has not shown again within the
last hour, since having rebooted with the nvidia

Ralf
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On Fri, Dec 9, 2011 at 12:16 PM, Ed Greshko <Ed.Greshko@greshko.com> wrote:

> I read this after responding to Mike's response.... * I think you are
> probably on to something with the X server and/or video driver/HW. *It
> may be helpful to know if you and Mike have similar HW?

I am seeing the same symptoms on different machines with different
hardware both i386 and x86_64, and some desktops with nvidia graphics,
also on netbook with onboard graphics - so for me this seems hardware
independent....
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On Fri, Dec 9, 2011 at 10:14 PM, mike cloaked <mike.cloaked@gmail.com> wrote:
> On Fri, Dec 9, 2011 at 12:16 PM, Ed Greshko <Ed.Greshko@greshko.com> wrote:
>
>> I read this after responding to Mike's response.... * I think you are
>> probably on to something with the X server and/or video driver/HW. *It
>> may be helpful to know if you and Mike have similar HW?
>
> I am seeing the same symptoms on different machines with different
> hardware both i386 and x86_64, and some desktops with nvidia graphics,
> also on netbook with onboard graphics - so for me this seems hardware
> independent....

After seeing the previous comment about a dictionary being the
possible culprit for my issue - I removed mine (British English
dictionary) and installed the US English dictionary instead - so far I
have not had the problem recur! I will continue to test for some days
to be sure - but if that was the problem it will be nice to not have
to put up with it in the future - I can probably (just!) cope with
American English.....

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On Sat, Dec 10, 2011 at 2:40 PM, mike cloaked <mike.cloaked@gmail.com> wrote:
> On Fri, Dec 9, 2011 at 10:14 PM, mike cloaked <mike.cloaked@gmail.com> wrote:
>> On Fri, Dec 9, 2011 at 12:16 PM, Ed Greshko <Ed.Greshko@greshko.com> wrote:
>>
>>> I read this after responding to Mike's response.... * I think you are
>>> probably on to something with the X server and/or video driver/HW. *It
>>> may be helpful to know if you and Mike have similar HW?
>>
>> I am seeing the same symptoms on different machines with different
>> hardware both i386 and x86_64, and some desktops with nvidia graphics,
>> also on netbook with onboard graphics - so for me this seems hardware
>> independent....
>
> After seeing the previous comment about a dictionary being the
> possible culprit for my issue - I removed mine (British English
> dictionary) and installed the US English dictionary instead - so far I
> have not had the problem recur! *I will continue to test for some days
> to be sure - but if that was the problem it will be nice to not have
> to put up with it in the future - I can probably (just!) cope with
> American English.....

Having thought the problem was gone - I found several occasions this
evening when I had the same line rendering fault as before but with
the US English dictionary - so I guess that it was not due to the
dictionary but something else! Shame!

I hope that it can be resolved but I think I will try to capture a
screenshot of the problem and push a bug report upstream to the
Thunderbird developers.... probably in a day or two when I get a
chance to capture some images....

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On 12/09/2011 12:14 PM, Ed Greshko wrote:
<>

> I must admit that I'd not done any detailed analysis. I will have to
> try composing a message when the condition happens again. As well as
> copy/paste to a different window outside of TB.
>
> In my case, since it only affects the Chinese characters I wonder if it
> is some sort of memory corruption.
-=-

have you tried shifting character thru area where you see problem?

such may lead to an indication of just where things are happening.
that is, memory vs video vs character buffer vs hard drive location.

is it same characters, same position on screen, etc.


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