Did The Silent Movie Stars Find The Transition To 'Talkies' Difficult?

In October 1927 the very first feature length talkie was released.  The release of 'The Jazz Singer' was met with conflicting emotions.  Although the vast majority welcomed the new films with sound, others longed for their beloved silent films.  Not only did many movie house orchestra musicians find themselves out of work but so did some of the great actors and actresses of the fading silent era.  With the new ability to record sound, actors and actresses were now being told that their voice was not right for 'talking pictures' and sadly this meant that many of the loved actors and actresses found it difficult, or simply were unable, to make the transition to the new sound films.
However, some of the true greats of the time managed to make a successful transition and welcomed the new adventure.  Charlie Chaplin, Greta Garbo, Joan Crawford and Lillian Gish were among the few who did make the transition over to the new screen.

The advent of sound did end some careers.  There are rumours that Louis B. Mayer did not like John Gilbert and tampered with recordings of his voice to make it sound higher pitched than it actually was.  Although Charlie Chaplin did continue to make movies after sound was introduced, he did not make a "talkie" until "The Great Dictator" in 1940.  
The most entertaining movie about this transition is "Singin' In The Rain".  It is probably the best movie musical ever made.  Gene Kelly, Donald O'Connor, Debbie Reynolds and Jean Hagen star.  

"Sunset Boulevard" is also a great movie about a silent film star who tries to resurrect her bygone career when a young writer's car breaks down near her house.  Gloria Swanson, William Holden and Erich von Stroheim star.

Did the silent movies have sound tracks for the music?