[Bug 842303] Re: graphthing menu does not appear in non-unity interface

2011-11-10 Thread Narayanan N
I think more than the application itself, the problems with the incompatibility of the two interfaces gnome and unity should be dealt with. There does not appear any attempt in that direction. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to

[Bug 842303] Re: graphthing menu does not appear in non-unity interface

2011-09-05 Thread Narayanan N
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/842303 Title: graphthing menu does not appear in non-unity interface To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+so

[Bug 842303] [NEW] graphthing menu does not appear in non-unity interface

2011-09-05 Thread Narayanan N
Public bug reported: When I login to unity, graphthing works fine. If I am using a non-unity environment like classic gnome, the menu does not appear and I cannot use any of the options (like to call a prefab graph, check the colouring numbers, save etc). ProblemType: Bug DistroRelease: Ubuntu 11

[Bug 772631] Re: kile don't insert the symbols on the left panel after a click

2011-05-26 Thread Narayanan N
I had to install the version from maverick to get it back to normal. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/772631 Title: kile don't insert the symbols on the left panel after a click -- ub

[Bug 757140] Re: docky crashes everytime

2011-04-10 Thread Narayanan N
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/757140 Title: docky crashes everytime -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 757140] [NEW] docky crashes everytime

2011-04-10 Thread Narayanan N
Public bug reported: Binary package hint: docky [Info 13:48:48.001] Docky version: 2.1.2 Release [Info 13:48:48.007] Kernel version: 2.6.38.8 [Info 13:48:48.008] CLR version: 2.0.50727.1433 [Debug 13:48:48.188] [UserArgs] BufferTime = 0 [Debug 13:48:48.188] [UserArgs] MaxSize = 2147483647 [Deb

[Bug 736247] Re: xpdf crashes while opening any pdf file

2011-03-16 Thread Narayanan N
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/736247 Title: xpdf crashes while opening any pdf file -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinf

[Bug 736247] [NEW] xpdf crashes while opening any pdf file

2011-03-16 Thread Narayanan N
Public bug reported: Binary package hint: xpdf I am filing a new bug despite it may be similar to an old bug 669211. xpdf does not crash if it is opened without any file. But when a file is opened, it shows the first page for a second and crashes (segfault/ core dumped ). This happened after i u

[Bug 690546] Re: ibus-m17n package is not selected even enabling language support for other languages

2010-12-15 Thread Narayanan N
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/690546 Title: ibus-m17n package is not selected even enabling language support for other languages -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubu

[Bug 690546] [NEW] ibus-m17n package is not selected even enabling language support for other languages

2010-12-15 Thread Narayanan N
Public bug reported: Binary package hint: ibus When I tried to enable language support for some indic languages (malayalam, sanskrit, tamil etc), by selecting Admin->Language Support and added these languages, the system prompted and installed many packages. This however does not install ibus-m

[Bug 680500] Re: mutter crashes with unity

2010-11-23 Thread Narayanan N
** Attachment added: "GDB backtrace" https://bugs.launchpad.net/bugs/680500/+attachment/1742541/+files/gdb-mutter.txt -- mutter crashes with unity https://bugs.launchpad.net/bugs/680500 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 680500] [NEW] mutter crashes with unity

2010-11-23 Thread Narayanan N
Public bug reported: Binary package hint: mutter The problem still persists after latest upgrade. So I am submitting a new bug report. ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: mutter 2.31.5-0ubuntu9 ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4 Uname: Linux 2.6.35-22-ge

Re: [Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-10-27 Thread Narayanan N
I have it for firefox as well as some Java programmes like Jin. It does not happen every time, but is frequent enough. On Wed, Oct 27, 2010 at 2:37 PM, Luca Lorenzetto wrote: > The problem still persists only for firefox as far as i can see in > maverik latest upgrades. Other softwares like chro

[Bug 534842] Re: Empathy shows "Network error" on all different connections.

2010-10-07 Thread Narayanan N
I have problem in the latest RC version of ubuntu 10.10 with yahoo addresses. Yahoo server address is not accepted even if you enter it manually. -- Empathy shows "Network error" on all different connections. https://bugs.launchpad.net/bugs/534842 You received this bug notification because you ar

[Bug 652915] Re: mutter restarts when closing Java application (Jin chess client)

2010-10-01 Thread Narayanan N
This does not happen in gnome. There is also a difference. When in gnome, the menus of java programs and mouse pointer is aligned, but in unity interface, these java program menus does not correctly follow the mouse pointer, but rather about a cm difference vertically. -- mutter restarts when clo

[Bug 652915] Re: mutter restarts when closing Java application (Jin chess client)

2010-10-01 Thread Narayanan N
Even though I am not able to reproduce it willingly, mutter crashes every 2 hours or so when I close firefox also. But it happens at random and not at will. -- mutter restarts when closing Java application (Jin chess client) https://bugs.launchpad.net/bugs/652915 You received this bug notificatio

[Bug 652915] Re: mutter restarts when closing Java application (Jin chess client)

2010-10-01 Thread Narayanan N
** Attachment added: "gdb-mutter-7.txt" https://bugs.launchpad.net/bugs/652915/+attachment/1662432/+files/gdb-mutter-7.txt ** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/652915/+attachment/1662433/+files/Dependencies.txt -- mutter restarts when closing Java appl

[Bug 652915] [NEW] mutter restarts when closing Java application (Jin chess client)

2010-10-01 Thread Narayanan N
Public bug reported: Binary package hint: mutter The earlier unity related issue of mutter restarting while closing some applications has come back in a modified form. It seems to happen when closing some java programs. I can always reproduce it when closing my Jin chess client. I have attached a

Re: [Bug 638664] Re: Unity crashes and mutter hangs the display refresh

2010-09-24 Thread Narayanan N
After an update I did 2 days before, this does not happen with me. Seems to be fixed. I have logged in say about 10 times since then. narayanan On Fri, Sep 24, 2010 at 5:08 PM, Didier Roche wrote: > Thanks for reporting this bug and help to make ubuntu better. > There is a mesa update in the

Re: [Bug 645724] Re: Ibus applet in unity does not allow selection of menu entries by mouse.

2010-09-22 Thread Narayanan N
reproduce it. But I am not sure how or why. If you have any ideas that I can try, I would be happy to try it out. thanks narayanan On Thu, Sep 23, 2010 at 12:06 PM, drizzle wrote: > Dear Narayanan N, > > Thank you for taking the time to report this bug and helping to make > Ubuntu be

[Bug 645724] Re: Ibus applet in unity does not allow selection of menu entries by mouse.

2010-09-22 Thread Narayanan N
Edit: Quit/restart seem to work sometimes if I try 2-3 times. -- Ibus applet in unity does not allow selection of menu entries by mouse. https://bugs.launchpad.net/bugs/645724 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-b

[Bug 645724] Re: Ibus applet in unity does not allow selection of menu entries by mouse.

2010-09-22 Thread Narayanan N
** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/645724/+attachment/1625461/+files/Dependencies.txt -- Ibus applet in unity does not allow selection of menu entries by mouse. https://bugs.launchpad.net/bugs/645724 You received this bug notification because you are a me

[Bug 645724] [NEW] Ibus applet in unity does not allow selection of menu entries by mouse.

2010-09-22 Thread Narayanan N
Public bug reported: Binary package hint: ibus This problem seems to be there for some time now. I am not able to select entries of ibus by clicking on the icon and selecting the desired item (language/restart/quit etc). If I want to set preferences, I need to manually start ibus-setup. similarly

[Bug 645699] Re: Empathy does not allow to save/use yahoo messenger server information

2010-09-22 Thread Narayanan N
** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/645699/+attachment/1625323/+files/Dependencies.txt -- Empathy does not allow to save/use yahoo messenger server information https://bugs.launchpad.net/bugs/645699 You received this bug notification because you are a memb

[Bug 645699] [NEW] Empathy does not allow to save/use yahoo messenger server information

2010-09-22 Thread Narayanan N
Public bug reported: Binary package hint: empathy When I add a new yahoo account to empathy, it always returns network error. When I check in the advanced tab, the Server field is empty. I tried to add one of the yahoo servers, but I am not able to either save this information or connect. When I

[Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-09-14 Thread Narayanan N
After an update today, the situation is different. There are no more restarts of mutter, but the entire display becomes blank except for mouse pointer. See bug report #638662 for details. Also unity crashes https://bugs.launchpad.net/ubuntu/+source/unity/+bug/638664 with arbitrary mouse clicks(sin

[Bug 638664] Re: Unity crashes and mutter hangs the display refresh

2010-09-14 Thread Narayanan N
** Attachment added: "unity crash gdb trace" https://bugs.launchpad.net/bugs/638664/+attachment/1586615/+files/unity-7.txt ** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/638664/+attachment/1586616/+files/Dependencies.txt -- Unity crashes and mutter hangs the disp

[Bug 638664] [NEW] Unity crashes and mutter hangs the display refresh

2010-09-14 Thread Narayanan N
Public bug reported: Binary package hint: unity I reported a problem with mutter, in https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/638662, but i got a crash of unity as well. So reporting with a gdb trace. Just after today's update, I am no longer able to use the unity interface to logi

[Bug 638662] Re: mutter hangs the desktop refresh

2010-09-14 Thread Narayanan N
** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/638662/+attachment/1586608/+files/Dependencies.txt -- mutter hangs the desktop refresh https://bugs.launchpad.net/bugs/638662 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribe

[Bug 638662] [NEW] mutter hangs the desktop refresh

2010-09-14 Thread Narayanan N
Public bug reported: Binary package hint: mutter Just after today's update, I am no longer able to use the unity interface to login. I only get a blank screen after logging in. When I logged into gnome session and started mutter, no more X events were handled neither the display got refreshed.

[Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-09-14 Thread Narayanan N
How do I revert glib version?. install from lucid? -- mutter restarts on closing almost any application (xterm not included) https://bugs.launchpad.net/bugs/634701 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing l

[Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-09-14 Thread Narayanan N
Here is the latest gdb trace. ** Attachment added: "gdb trace with dbgsym" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/634701/+attachment/1581802/+files/gdb-27080.txt -- mutter restarts on closing almost any application (xterm not included) https://bugs.launchpad.net/bugs/634701 You

Re: [Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-09-14 Thread Narayanan N
It would be great if somebody can tell me what packages are glib related where I should try dbgsym. On Tue, Sep 14, 2010 at 3:04 PM, Didier Roche wrote: > Hum, you first backtrace (in comment #5) looks interesting. We definitely > need something like that to catch and fix this bug. > Can you ple

Re: [Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-09-13 Thread Narayanan N
Also to add that if a program is started from terminal, its closure sometimes results in the crash of terminal also. On Tue, Sep 14, 2010 at 9:15 AM, Narayanan N <634...@bugs.launchpad.net>wrote: > This one is the gdb trace after installing dbgsym for unity packages. No > dbgsym fo

[Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-09-13 Thread Narayanan N
Another gdb trace when i press Super 0 to open applications or super tab, mutter crashes. ** Attachment added: "mutter crash gdb trace - super 0 :: unity interface" https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/634701/+attachment/1580681/+files/gdb-mutter-6.txt -- mutter restarts on

[Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-09-13 Thread Narayanan N
This one is the gdb trace after installing dbgsym for unity packages. No dbgsym for mutter yet. I opened gv and closed it to produce the crash. ** Attachment added: "gdb trace closing gv" https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/634701/+attachment/1580670/+files/gdb-mutter-5.

Re: [Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-09-13 Thread Narayanan N
Sorry for the late reply. I am running in UNE session most of the time. Once in a while I log into to gnome session for 5 min or so. One problem I noticed is that once I log on to gnome session, the old style menu bar comes along the unity bar. I have to remove the conf files to get it disappear. T

Re: [Bug 636743] Re: mutter restarts when any application is closed, also kills the terminal which starts the app.

2010-09-12 Thread Narayanan N
*** This bug is a duplicate of bug 634701 *** https://bugs.launchpad.net/bugs/634701 i realise now it is the same version of mutter. but the problem disappeared after an update for 2 days. latest update it came back. so where is the problem. it is not in mutter? On Mon, Sep 13, 2010 at 10:54

[Bug 636743] Re: mutter restarts when any application is closed, also kills the terminal which starts the app.

2010-09-12 Thread Narayanan N
** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/636743/+attachment/1576088/+files/Dependencies.txt -- mutter restarts when any application is closed, also kills the terminal which starts the app. https://bugs.launchpad.net/bugs/636743 You received this bug notificati

[Bug 636743] [NEW] mutter restarts when any application is closed, also kills the terminal which starts the app.

2010-09-12 Thread Narayanan N
Public bug reported: Binary package hint: mutter This is even more serious than the previous problem. Earlier, mutter used to restart when an application was closed. That temporarily disappeared after one upgrade. Now it has comeback with the following addon!. If an application, (like gv, firefo

[Bug 635422] Re: dconf-service crashed with signal 5 in g_closure_invoke()

2010-09-12 Thread Narayanan N
There seems to be even more serious problem now. Almost all applications are either crashing or when any application is closed, it restarts mutter. This behaviour was there earlier, but then disappeared in the previous update. It has surfaced again. -- dconf-service crashed with signal 5 in g_clo

[Bug 634701] Re: mutter restarts on closing almost any application (xterm not included)

2010-09-09 Thread Narayanan N
** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/634701/+attachment/1564531/+files/Dependencies.txt -- mutter restarts on closing almost any application (xterm not included) https://bugs.launchpad.net/bugs/634701 You received this bug notification because you are a mem

[Bug 634701] [NEW] mutter restarts on closing almost any application (xterm not included)

2010-09-09 Thread Narayanan N
Public bug reported: Binary package hint: mutter On closing gv, xpdf, or firefox, I found that mutter restarts itself. Here is a gdb trace. But mutter still do not have debug symbols. GNU gdb (GDB) 7.2-ubuntu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or

[Bug 633711] Re: grinvin crashes before loading workspace

2010-09-08 Thread Narayanan N
** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/633711/+attachment/1558862/+files/Dependencies.txt -- grinvin crashes before loading workspace https://bugs.launchpad.net/bugs/633711 You received this bug notification because you are a member of Ubuntu Bugs, which is

[Bug 633711] [NEW] grinvin crashes before loading workspace

2010-09-08 Thread Narayanan N
Public bug reported: Binary package hint: grinvin This bug seems to have been for there for some time now. I could not find any report searching the launchpad with grinvin. The problem seems to be with incompatibility of java version. If I download the grinvin from the homepage that includes JRE

[Bug 632850] Re: Menu item selection does not follow mouse pointer

2010-09-08 Thread Narayanan N
Another package that have this problem is grinvin. -- Menu item selection does not follow mouse pointer https://bugs.launchpad.net/bugs/632850 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@list

[Bug 632850] Re: Menu item selection does not follow mouse pointer

2010-09-07 Thread Narayanan N
** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/632850/+attachment/1555742/+files/Dependencies.txt -- Menu item selection does not follow mouse pointer https://bugs.launchpad.net/bugs/632850 You received this bug notification because you are a member of Ubuntu Bugs,

[Bug 632850] [NEW] Menu item selection does not follow mouse pointer

2010-09-07 Thread Narayanan N
Public bug reported: Binary package hint: unity I am not sure if this is a bug of unity or not. but I cannot pin point it to a single package. It sometimes happen that when I select a menu and use the mouse pointer to select an item, I need to keep the pointer way below the item to get it select

[Bug 592716] Re: Dual Monitor support

2010-09-07 Thread Narayanan N
An even bigger problem that I noticed is that on dual monitor mode, the windows which are on the right display, the buttons, menu etc. appear on the left/main display. This happens when the applications are in fullscreen mode/maximized. -- Dual Monitor support https://bugs.launchpad.net/bugs/5927

[Bug 632832] Re: poutchess crashes before the play board appears

2010-09-07 Thread Narayanan N
** Attachment added: "Strace" https://bugs.launchpad.net/bugs/632832/+attachment/1555663/+files/pouetstrace.txt ** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/632832/+attachment/1555664/+files/Dependencies.txt -- poutchess crashes before the play board appears h

[Bug 632832] [NEW] poutchess crashes before the play board appears

2010-09-07 Thread Narayanan N
Public bug reported: Binary package hint: pouetchess Here is the gdb trace and strace attached GNU gdb (GDB) 7.2-ubuntu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change an

[Bug 632200] Re: Mutter restarts when applications button in the unity interface is clicked

2010-09-07 Thread Narayanan N
Sorry, saw the message just now. Here is the latest with libunity0-dbgsym installed. GNU gdb (GDB) 7.2-ubuntu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistrib

[Bug 625533] Re: weird window management behavior

2010-09-07 Thread Narayanan N
There are other similar problems. The top unity bar applets are not clickable immediately after login unless the ubuntu icon on the top left is clicked, selects the rightmost power button/ some other palace to change focus and then click it. This also happens sometimes during while we work. It is

[Bug 632200] Re: Mutter restarts when applications button in the unity interface is clicked

2010-09-07 Thread Narayanan N
Here is the trace with dbg packages for unity. Could not get any dbg packages for mutter. GNU gdb (GDB) 7.2-ubuntu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redis

Re: [Bug 632200] Re: Mutter restarts when applications button in the unity interface is clicked

2010-09-07 Thread Narayanan N
There seems to be no dbg dbgsym packages for mutter On Tue, Sep 7, 2010 at 4:37 PM, Didier Roche wrote: > hum that's a new crash then. > > We miss debug symbols to be able to handle it properly, can you please > install them (as described at > https://wiki.ubuntu.com/DebuggingProgramCrash) for a

[Bug 632200] Re: Mutter restarts when applications button in the unity interface is clicked

2010-09-07 Thread Narayanan N
Here is the gdb backtrace of mutter. I am not sure if I understand anything. GNU gdb (GDB) 7.2-ubuntu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. T

Re: [Bug 632200] Re: Mutter restarts when applications button in the unity interface is clicked

2010-09-07 Thread Narayanan N
sorry, my mistake. did not see the pidof option. stupid of me. On Tue, Sep 7, 2010 at 3:41 PM, Narayanan N wrote: > Hi, > thanks. How can I backtrace mutter or unity, since it is restarted > automatically by the system. Is there a way to suppress the restart and use > gdb mutter

Re: [Bug 632200] Re: Mutter restarts when applications button in the unity interface is clicked

2010-09-07 Thread Narayanan N
Hi, thanks. How can I backtrace mutter or unity, since it is restarted automatically by the system. Is there a way to suppress the restart and use gdb mutter or gdb unity so that the program actually takes control of the window runs under gdb? regards narayanan On Tue, Sep 7, 2010 at 3:21 PM, Di

[Bug 632200] Re: Mutter restarts when applications button in the unity interface is clicked

2010-09-07 Thread Narayanan N
** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/632200/+attachment/1552807/+files/Dependencies.txt -- Mutter restarts when applications button in the unity interface is clicked https://bugs.launchpad.net/bugs/632200 You received this bug notification because you are a

[Bug 632200] [NEW] Mutter restarts when applications button in the unity interface is clicked

2010-09-07 Thread Narayanan N
Public bug reported: Binary package hint: mutter The window manager mutter gets restarted when applications button is pressed after the last update. ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: mutter 2.31.5-0ubuntu5 ProcVersionSignature: Ubuntu 2.6.35-19.28-generic 2.6.35.3 Uname: Linu

[Bug 632117] [NEW] Okular does not refresh properly in maverick while in fullscreen mode

2010-09-06 Thread Narayanan N
Public bug reported: Binary package hint: okular While changing pages of pdf files in full screen mode, okular does not refresh the pages properly. This makes it quite difficult to use. ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: okular 4:4.5.1-0ubuntu1 ProcVersionSignature: Ubuntu 2.6

[Bug 632117] Re: Okular does not refresh properly in maverick while in fullscreen mode

2010-09-06 Thread Narayanan N
** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/632117/+attachment/1552447/+files/Dependencies.txt -- Okular does not refresh properly in maverick while in fullscreen mode https://bugs.launchpad.net/bugs/632117 You received this bug notification because you are a memb

[Bug 627190] Re: xpdf crashed with SIGSEGV in UnicodeMapCache::getUnicodeMap()

2010-08-30 Thread Narayanan N
** Attachment added: "CoreDump.gz" https://bugs.launchpad.net/bugs/627190/+attachment/1531045/+files/CoreDump.gz ** Attachment added: "Dependencies.txt" https://bugs.launchpad.net/bugs/627190/+attachment/1531046/+files/Dependencies.txt ** Attachment added: "Disassembly.txt" https://bu