Hello x2go dev team,
as I was looking for an alternative on NX nomachine, because it was broken with the last Cairo 1.12 update, I found your x2go solution, which is great.
So as it bases on the same libraries than the original nomachine, you had the same issues - with rendering to undrawable objects, the whole nxagent crashes because of SEGV.
With the patch of Jan (thanks to) you committed to the master branch today, I compiled another nxagent. Actually it worked fine, but after suspending and reconnecting to a session, some graphical objects get broken...
All characters/fonts that has been rendered on the screen prior the suspension, are gone. (See Screenshots the link below). Creating new text by starting applications is ok, as long as the characters has not been rendered in the session before.
I thought it might be problem with a kind of glyph cache of the X session (ubuntu/x86 x2goclient). But I found one case, where additionally to the text, all icons are gone also, which was with an debian/x64 x2goclient... (Difference can be seen on screenshots)
Might it have to do something with the patch from today, that could filter out to much rendering? Or is this issue known from somewhere else?
Here are some screenshots: http://www.computerfreak.de/sonic/x2shots/
Thanks for your help, Holger
If the glyph breakage is because of my patch it's probably because the patch is rather non-selective. If nxagent's render code tries to reference a null pointer I prevent it from doing that.
I'm not specifically aware how that might break your glyphs, but if it does I suspect it's because my code is preventing remote synchronization of the rendered object. Look at all of the conditionals in the patch that perform a sync operation if true.
I wonder if someone like Keith Packard could help. Perhaps if we point the nomachine guys at our patch they might suggest a cleaner fix.
...or it might be completely unrelated to your problem. :-) On May 11, 2012 4:51 PM, "Holger Hahn" <x2go-dev@computerfreak.de> wrote:
Hello x2go dev team,
as I was looking for an alternative on NX nomachine, because it was broken with the last Cairo 1.12 update, I found your x2go solution, which is great.
So as it bases on the same libraries than the original nomachine, you had the same issues - with rendering to undrawable objects, the whole nxagent crashes because of SEGV.
With the patch of Jan (thanks to) you committed to the master branch today, I compiled another nxagent. Actually it worked fine, but after suspending and reconnecting to a session, some graphical objects get broken...
All characters/fonts that has been rendered on the screen prior the suspension, are gone. (See Screenshots the link below). Creating new text by starting applications is ok, as long as the characters has not been rendered in the session before.
I thought it might be problem with a kind of glyph cache of the X session (ubuntu/x86 x2goclient). But I found one case, where additionally to the text, all icons are gone also, which was with an debian/x64 x2goclient... (Difference can be seen on screenshots)
Might it have to do something with the patch from today, that could filter out to much rendering? Or is this issue known from somewhere else?
Here are some screenshots: http://www.computerfreak.de/sonic/x2shots/
Thanks for your help, Holger
X2Go-Dev mailing list X2Go-Dev@lists.berlios.de https://lists.berlios.de/mailman/listinfo/x2go-dev
Hi Jim, hi Holger,
On Sa 12 Mai 2012 03:22:24 CEST Jim Burnes wrote:
Hello x2go dev team,
as I was looking for an alternative on NX nomachine, because it was broken with the last Cairo 1.12 update, I found your x2go solution, which is great.
So as it bases on the same libraries than the original nomachine, you had the same issues - with rendering to undrawable objects, the whole nxagent crashes because of SEGV.
With the patch of Jan (thanks to) you committed to the master branch today, I compiled another nxagent. Actually it worked fine, but after suspending and reconnecting to a session, some graphical objects get broken...
All characters/fonts that has been rendered on the screen prior the suspension, are gone. (See Screenshots the link below). Creating new text by starting applications is ok, as long as the characters has not been rendered in the session before.
I thought it might be problem with a kind of glyph cache of the X session (ubuntu/x86 x2goclient). But I found one case, where additionally to the text, all icons are gone also, which was with an debian/x64 x2goclient... (Difference can be seen on screenshots)
Might it have to do something with the patch from today, that could filter out to much rendering? Or is this issue known from somewhere else?
Here are some screenshots: http://www.computerfreak.de/sonic/x2shots/
Thanks for your help, Holger
If the glyph breakage is because of my patch it's probably because the patch is rather non-selective. If nxagent's render code tries to reference a null pointer I prevent it from doing that.
I'm not specifically aware how that might break your glyphs, but if it does I suspect it's because my code is preventing remote synchronization of the rendered object. Look at all of the conditionals in the patch that perform a sync operation if true.
I wonder if someone like Keith Packard could help. Perhaps if we point the nomachine guys at our patch they might suggest a cleaner fix.
...or it might be completely unrelated to your problem. :-)
On May 11, 2012 4:51 PM, "Holger Hahn" <x2go-dev@computerfreak.de> wrote:
The phenomenon described by Holger did not exist before the patch.
However, the patch currently still is an improvement when X2Go is
installed on Debian wheezy or sid.
@Jim-1: it seems like you currently have the most expertise on your
own patch. Possibly you find some more time to look at it. I cannot
yet confirm the suspend-resume-phenomenon described by Holger, but the
screenshots are self-explaining.
@All: whoever has some ressources during the next week, it would be
good to take a look at Jim's patch.
@Jim-2: I am in contact with NoMachine and they are aware of our
comprehensive patch series we apply on top of NX upstream. That result
we call NX (redistributed) and we are also upstream for the Debian
src:package nx-libs-lite. I will additionaly send an eMail to the
NoMachine developer list.
@Jim-3: are you in direct contact with Keith Packard? If so, please
contact him. We are (at the end) searching for a team of people who
are willing to port NX to Xorg7 and make it a constant component of
Xorg, but that's still more a dream than something in near reality...+
Greets, Mike
--
DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419
GnuPG Key ID 0xB588399B mail: mike.gabriel@das-netzwerkteam.de, http://das-netzwerkteam.de
freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.xf...
I'll do what I can on this patch. I definitely plan on improving it, but my first objective was to get firefox and emacs running again so I could get back to work.
No, I don't know Keith Packard but I thought that NX was valuable enough so that it's continued functionality might be important to the wider X community.
To create a proper patch I'll have to figure out exactly what those render ops are doing and (the null src drawables are gradients and related ops), but processing them intelligently so they are sync'd with the nxclient end will take some digging.
It could be that the sync operation just needs a small fix so that it doesn't reference the null components. I'm bringing up a new laptop this morning, but I'll see what I can do.
Let me know if you hear from nomachine at all. I used to chat with those guys once in a while and even gave them a quote for a book they released, but it's been 7 years.
jim
On Sat, May 12, 2012 at 6:45 AM, Mike Gabriel < mike.gabriel@das-netzwerkteam.de> wrote:
Hi Jim, hi Holger,
On Sa 12 Mai 2012 03:22:24 CEST Jim Burnes wrote:
Hello x2go dev team
as I was looking for an alternative on NX nomachine, because it was broken with the last Cairo 1.12 update, I found your x2go solution, which is great.
So as it bases on the same libraries than the original nomachine, you had the same issues - with rendering to undrawable objects, the whole nxagent crashes because of SEGV.
With the patch of Jan (thanks to) you committed to the master branch today, I compiled another nxagent. Actually it worked fine, but after suspending and reconnecting to a session, some graphical objects get broken...
All characters/fonts that has been rendered on the screen prior the suspension, are gone. (See Screenshots the link below). Creating new text by starting applications is ok, as long as the characters has not been rendered in the session before.
I thought it might be problem with a kind of glyph cache of the X session (ubuntu/x86 x2goclient). But I found one case, where additionally to the text, all icons are gone also, which was with an debian/x64 x2goclient... (Difference can be seen on screenshots)
Might it have to do something with the patch from today, that could filter out to much rendering? Or is this issue known from somewhere else?
Here are some screenshots: http://www.computerfreak.de/**sonic/x2shots/<http://www.computerfreak.de/sonic/x2shots/>
Thanks for your help, Holger
If the glyph breakage is because of my patch it's probably because the
patch is rather non-selective. If nxagent's render code tries to reference a null pointer I prevent it from doing that.
I'm not specifically aware how that might break your glyphs, but if it does I suspect it's because my code is preventing remote synchronization of the rendered object. Look at all of the conditionals in the patch that perform a sync operation if true.
I wonder if someone like Keith Packard could help. Perhaps if we point the nomachine guys at our patch they might suggest a cleaner fix.
...or it might be completely unrelated to your problem. :-)
On May 11, 2012 4:51 PM, "Holger Hahn" <x2go-dev@computerfreak.de> wrote:
The phenomenon described by Holger did not exist before the patch. However, the patch currently still is an improvement when X2Go is installed on Debian wheezy or sid.
@Jim-1: it seems like you currently have the most expertise on your own patch. Possibly you find some more time to look at it. I cannot yet confirm the suspend-resume-phenomenon described by Holger, but the screenshots are self-explaining.
@All: whoever has some ressources during the next week, it would be good to take a look at Jim's patch.
@Jim-2: I am in contact with NoMachine and they are aware of our comprehensive patch series we apply on top of NX upstream. That result we call NX (redistributed) and we are also upstream for the Debian src:package nx-libs-lite. I will additionaly send an eMail to the NoMachine developer list.
@Jim-3: are you in direct contact with Keith Packard? If so, please contact him. We are (at the end) searching for a team of people who are willing to port NX to Xorg7 and make it a constant component of Xorg, but that's still more a dream than something in near reality...+
Greets, Mike
--
DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419
GnuPG Key ID 0xB588399B mail: mike.gabriel@das-netzwerkteam.**de<mike.gabriel@das-netzwerkteam.de>, http://das-netzwerkteam.de
freeBusy: https://mail.das-netzwerkteam.**de/freebusy/m.gabriel%40das-** netzwerkteam.de.xfb<https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.xfb>
X2Go-Dev mailing list X2Go-Dev@lists.berlios.de https://lists.berlios.de/mailman/listinfo/x2go-dev
Hi Jim, hi all,
On Sa 12 Mai 2012 17:18:36 CEST Jim Burnes wrote:
Let me know if you hear from nomachine at all. I used to chat with those guys once in a while and even gave them a quote for a book they released, but it's been 7 years.
I just dropped a notification on this issue by means of the NoMachine
website contact form. I pointed them to the patch file on git.x2go.org.
Cheers, Mike
--
DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419
GnuPG Key ID 0xB588399B mail: mike.gabriel@das-netzwerkteam.de, http://das-netzwerkteam.de
freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.xf...
Am Sat, 12 May 2012 00:10:11 +0200 schrieb Holger Hahn <x2go-dev@computerfreak.de>:
With the patch of Jan (thanks to) you committed to the master branch today, I compiled another nxagent. Actually it worked fine, but after suspending and reconnecting to a session, some graphical objects get broken...
I can confirm this suspend/rendering issue with that patch in ArchLinux with cairo 1.12.1 and FreeNX based on the NX redistributed libs 3.5.0.13.
The server is running a nvidia card with the closed driver. Client run Xorg ati driver.
Not much more I can say right now.
-Andy ArchLinux
-
Andreas Radke -
Holger Hahn -
Jim Burnes -
Mike Gabriel