[Kernel-packages] [Bug 1938999] Re: External displays not working on Thinkpad T490 with ThinkPad Thunderbolt 3 Dock

2021-09-10 Thread Tomas Petricek
Thanks for the fix. I'm not sure to whom the previous message is addressed but I will not be able to test it because I'm will not be at the office until end of September. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. htt

[Kernel-packages] [Bug 1938999] Re: External displays not working on Thinkpad T490 with ThinkPad Thunderbolt 3 Dock

2021-08-11 Thread Tomas Petricek
I also installed the 5.13.9 kernel, again with the same unmet dependency: dpkg: dependency problems prevent configuration of linux-headers-5.13.9-051309-generic: linux-headers-5.13.9-051309-generic depends on libc6 (>= 2.33); however: Version of libc6:amd64 on system is 2.31-0ubuntu9.2. To my

[Kernel-packages] [Bug 1938999] Re: External displays not working on Thinkpad T490 with ThinkPad Thunderbolt 3 Dock

2021-08-11 Thread Tomas Petricek
There seems to be a dependency problem with linux- headers-5.13.0-051300-generic: dpkg: dependency problems prevent configuration of linux-headers-5.13.0-051300-generic: linux-headers-5.13.0-051300-generic depends on libc6 (>= 2.33); however: Version of libc6:amd64 on system is 2.31-0ubuntu9.2

[Kernel-packages] [Bug 1938999] Re: External displays not working on Thinkpad T490 with ThinkPad Thunderbolt 3 Dock

2021-08-11 Thread Tomas Petricek
I tested again on kernels 5.8 and 5.11 with nvidia-driver-470. Logs are attached. With 5.8 kernel, the external displays eventually come to live, after connecting the dock and some waiting (~15 s). After first connection, it seemed to be doing several trials, in the end it worked too. With 5.11 k

[Kernel-packages] [Bug 1938999] Re: External displays not working on Thinkpad T490 with ThinkPad Thunderbolt 3 Dock

2021-08-09 Thread Tomas Petricek
Thanks for looking into this. I changed the drivers to nouveau to workaround some previous issues I had with external displays and then I forgot made this change. Could you point me to how to test with 5.13/5.14 kernels, please? If possible I would like to stick to the default drivers/kernel. For

[Kernel-packages] [Bug 1938999] [NEW] External displays not working on Thinkpad T490 with ThinkPad Thunderbolt 3 Dock

2021-08-05 Thread Tomas Petricek
Public bug reported: I have two external displays chained via Display port connected to the ThinkPad Thunderbolt 3 Dock. They are working with kernel 5.8.0-63 but not with the new 5.11.0-25 kernel. I could reproduce this behavior several times for both kernels, as follows: I booted up with disco