Public bug reported: On a system with a Sapphire ATI Radeon HD 4350 512MB DDR2 PCI-E HDMI/DVI-I/VGA card I upgraded from Ubuntu Desktop 10.10 64-bit (with Linux 2.6.35-30-generic #54-Ubuntu SMP Tue Jun 7 18:41:54 UTC 2011 x86_64) to Ubuntu Desktop 11.04 64-bit with Linux 2.6.38-10-generic #44-Ubuntu SMP Thu Jun 2 21:32:22 UTC 2011 x86_64.
After selecting standard boot in the GRUB menu, I regularly get the blank screen and I'm not able to log in. If I select the recovery mode in the GRUB menu, I am able to choose failsafeX and to log in to a GDM session. Near the end of /var/log/Xorg.0.log I found: Backtrace: [ 18.246] 0: /usr/bin/X (xorg_backtrace+0x26) [0x4a2656] [ 18.246] 1: /usr/bin/X (0x400000+0x621ca) [0x4621ca] [ 18.246] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f13082db000+0xfc60) [0x7f13082eac60] [ 18.246] 3: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7f1305161000+0xd23fd) [0x7f13052333fd] [ 18.246] 4: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7f1305161000+0xd465f) [0x7f130523565f] [ 18.246] 5: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7f1305161000+0x8586e) [0x7f13051e686e] [ 18.246] 6: /usr/bin/X (xf86SetDesiredModes+0x1e3) [0x48c7d3] [ 18.246] 7: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7f1305161000+0x44dd5) [0x7f13051a5dd5] [ 18.246] 8: /usr/bin/X (AddScreen+0x1a8) [0x42e658] [ 18.246] 9: /usr/bin/X (InitOutput+0x294) [0x470094] [ 18.246] 10: /usr/bin/X (0x400000+0x218c3) [0x4218c3] [ 18.246] 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xff) [0x7f1307224eff] [ 18.246] 12: /usr/bin/X (0x400000+0x21629) [0x421629] [ 18.246] Segmentation fault at address 0x1b0 [ 18.246] Caught signal 11 (Segmentation fault). Server aborting Booting to the earlier version of Linux (2.6.35-30) does not help. I would appreciate very much a quick solution or workaround as otherwise I would need to revert to Ubuntu 10.10. ** Affects: xorg-server (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/802186 Title: after boot X server crashes (segmentation fault) with blank screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/802186/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs