Can you capture your dmesg output after you notice this issue? Please then attach it to this report. Additionally, can you also try installing the linux-ubuntu-modules package (version 2.6.24-23.36) to see if it helps? It contains a fix for bug 226413 which sounds similar to the issue you are seeing. If the issue still exists, it might also be good to see the dmesg output from your system after you installed and tested with linux-ubuntu-modules. Thanks.
Hi Jacek_G,
Can you capture your dmesg output after you notice this issue? Please then attach it to this report. Additionally, can you also try installing the linux-ubuntu- modules package (version 2.6.24-23.36) to see if it helps? It contains a fix for bug 226413 which sounds similar to the issue you are seeing. If the issue still exists, it might also be good to see the dmesg output from your system after you installed and tested with linux-ubuntu- modules. Thanks.